VNA Level I Module 5: Nutritional Assessmentvna.hillsvet.com/pdf/en-us/Module_5.pdf · VNA Level 1...
Transcript of VNA Level I Module 5: Nutritional Assessmentvna.hillsvet.com/pdf/en-us/Module_5.pdf · VNA Level 1...
Learning ObjectivesAfter completing this module, your basic understanding should include: •Anappreciationfortheimportanceofpropernutritionalassessment. •Yourability,alongwithyourteamtoconductathoroughnutritional assessment. •Realizinghowcriticalregularnutritionalassessmentsare,evenforsocalledhealthypets.
VNA Level I Module 5: Nutritional Assessment
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VNA Level 1 Module 5: Nutritional Assessment
IntroductionThegeneralpublicisbecomingincreasinglyawareofthegrowingassociationoffoodwithconditionssuchasheartdisease,highbloodpressure,obesity,diabetes,andcancer.Moreandmorepetownersarerealizingthatproperpetnutritionisextremelyimportantinmaximizinghealth,performance,longevity,anddiseaseprevention.Theyalsowantrecommendationsaboutwhatisbesttofeedtheirpetandwillappreciateyournutritionalassessment.
Hill’saspartofthePracticeHealthSMinitiative,surveyedover900“ideal”clientstodeterminetheirwants,needs,andexpectations.Thisstudyrevealedsomeveryinterestinginsightsabouthowtheseidealclientsviewnutritionfortheirpets.Oftheclientssurveyed,94%feltthatnutritionalcounselingfromtheirveterinarianisimportant;53%ofthisgroupsaidnutritionalcounselingwascriticallyimportant(Figure1).Sixtypercentoftheclientssurveyedalsobelievedtheirveterinarian’srecommendationofapetfoodwasimportant(Figure2).Withoutquestion,veterinariansandtheirhealthcareteamscanstronglyinfluencenutritionchoices.Andtheyshould,withconviction!
You need to (confidently and compe-tently) be an advocate for the pet’s best interest!
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Client Insights: How Important Is Nutrition Counseling?
42%18%
31%6%
3%
How Important Is a Veterinarian’s Recommendation on the Choice of Pet Food?
Figure1 Figure2
SoMewhAt
CrItICALLy
IMportANt
Not At ALL
Not Very 53%
15%
27%4%
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the Two-Step Nutritional Assessment ProcessFigure3depictsthetwo-stepprocessofnutritionalassessment.Thetopcircledepictsthefirststep;itinvolvesassessmentofthepatient,thefood,andthefeedingmethod.Thebottomcircledepictsthesecondstep;itinvolvesdevelopmentofafeedingplanandincludesrecommendationsforfoodandfeedingmethods.
Periodically(thelengthofwhichdependsontheconditionofthepatient),thetwo-stepprocessisrepeatedtodeterminetheappropriatenessoreffectivenessofthenewfeedingplan.Thus,thepatientisreassessedand,ifitsstatushaschanged,anewfeedingplanisimplemented.Thetwo-stepprocesscanberepeatedanynumberoftimes,dependingontheneedsofeachpatient.Acriticallyillpatientmayneedtobereassessedeveryfewhours,whereasanormaladultdogorcatmaybereassessedonly2-4timesayear.
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Figure 3. Cats are becoming a more important part of the family.
The arrows in Figure 3 indicate that nutritional assessment should continue for the life of the pet.
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VNA Level 1 Module 5: Nutritional Assessment
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Whenyouconsiderallthediseasesforwhichpropernutritionhelpsprevent,aidsinrecoveryorlong-termmanagementandallthenutritionalriskfactorsthatpetsencounter,it’sobviousthatallpetsneednutritionalassessmenteachtimetheyareseenatyourpractice.Forexample,acertainpercentageofpetsyouseeareatvaryingdegreesofriskforoneormoreoftheseconditions:Anemia,traumaorsurgery,cancer,lowerurinarytractdisease,kidneyfailure,heartdiseaseandfailure(includingheartwormdisease),poororalhealth,dermatologicalproblems,obesitypreventionandtreatment,skeletaldiseaseespeciallyinpuppies,andgastrointestinaldisease.Combined,theseconditionsandtheirpreventionmakeupmuchofsmallanimalpractice.Itisimportantnottooverlookso-called“well”petsthough.Justbecausetheyappear“healthy”doesn’tmeantheywouldn’tbenefitbeingonabetterplaneofnutrition.Remember,asveterinaryhealthcareteammembers,we’reworriedabouttheinsideofthepet,notjustoutwardappearances.
Remember, nutritional deficiencies and excesses usually take a period of time to manifest themselves.
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the Two-Step Nutritional Assessment Process
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Figure 4. An obese dog and cat, each with a Body Condition Score of 5/5.
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Inwellpets,thenutritionalassessmentprocessidentifiespetsatriskforconditionssuchasobesity,renaldiseaseandsomeformsoforaldisease,whichmaybeavoidedorminimizedwithpropernutrition.Puppies,forexample,shouldbeevaluatedforappropriatenutritioneverytwotothreeweeks.Theamountoffoodandthefeedingmethodandhowlongthefoodisleftwiththepuppyandmayneedtobechangedbasedonbodyconditionscore(seebelow).Asapetages,riskfactorsincrease.Ovariohysterectomy/castration(spaying/neutering),increasingage,decreasingactivitylevel,etc.areriskfactorsforobesity.Assessingthepet,assessingthefood,implementingaplaninwhichthenutrientsandenergyinthefoodarematchedtothepatient,andmonitoring(follow-up)canhelpavoidobesity,andperhapsotherconditions.ThecycledescribedinFigure3shouldbecompletedeachtimeawellpatientisseen.Nutritionalassessmentofpetswithmedicalconditionshelpsuncovermodificationsthatneedtobemade,theeffectsofmedicationsonnutrients,andviceversa.AsyousawinI.2FeedingDogsandI.3FeedingCats,itisimportanttotakesuchassessmentsseriously.
the Two-Step Nutritional Assessment Process
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VNA Level 1 Module 5: Nutritional Assessment
Assess The PetThegoalofpatientnutritionalassessmentistoestablishthepet’snutrientneedsandfeedingprotocolinwellnessordisease.Theveterinaryhealthcareteamneedstoensurethatathoroughpethistoryisobtained,alongwiththeveterinarian’scompletephysicalexaminationemphasizingbodysystems.Properinterpretationofthesedataleadstoalogicaldiagnosticworkupbytheveterinarianandcorrecttherapeuticandnutritionalplans.Figure5describesscreeningprotocolsforallpatientsandmorein-depthassessmentprotocolsforpatientsthatneedamorethoroughworkup.Theelementsofassessingthepatientinclude:
•Reviewingthemedicalrecords. •Interviewingtheclient,includingobtainingadietaryhistory(“Whatare youcurrentlyfeeding?”“Whattreatsdoyoufeed?”Whointhefamily feedsthepet?”). •Examiningthepatient,emphasizingabodysystemsapproachandbody conditionscoring. •Obtaininganthropometric(zoometric)measurements(Seebelow). •Reviewinglaboratoryandotherdiagnosticdata. •Estimatingtargetlevelsforthekeynutritionalfactorsbasedonthe patient’smedicaldiagnosisorstateofwellness(Seebelow)
Involvement in nutritional assessment should be under the supervision of a veterinarian.
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Review of the medical recordprovidesobjectivehistoricalinformationanddocumentsthepet’sprevioushealthstatus,healthmaintenanceproceduresthatwereperformed,andmedicationsandfoodsthatwereprescribed.Thisinformationshouldbeevaluatedtodetermineifanyofthesefactorsarerelatedtothepet’scurrentnutritionalstatus.Thisreviewpermitsearlynutritionalinterventioninthetreatmentofestablishedmalnutrition(under-orovernutrition)andinthepreventionofmalnutritioninindividualsatrisk.
Medicalrecordsprovidevaluableinformationaboutthepet’sweightovertime.Ingeneral,dogsandcatsshouldweighnomoreinlateryearsthantheydidduringtheirfirstfullyearofmaturity.Medicalrecordsalsoprovidecluesaboutriskfactors,suchasage,breed,gender,neuterstatus,environment(exposuretootherpets,typeofshelter,etc.),andmedical/surgicalproblems(adversereactiontofood/drugreactions),etc.
Figure 6. Veterinary medical records provide valuable information about the chronology of a pet’s weight gain or loss.
Figure 5.
Assess The Pet
ReviewmedicalhistoryCurrenthistory/diethistoryPhysicalexamZoometricsDiagnosticsRiskfactors
AbnormalfindingsToomuch/toolittlefoodintakeClinicalsignsofdiseaseAbnormalbodyprotein/fatstoresAbnormaldiagnosticresults
InterventionChangenutritionalplan
NormalfindingsFewriskfactorsBodyconditionscore=3
NormalfindingsHighriskfornutritionaldisordersMorediagnosticsesp.withage
Discussoptimalnutritionalplan(petmaynotbeonproperdiet)
InterventionChangenutritionalplan
Re–evaluatefrequently
Re–evaluatefrequently
Re–evaluatefrequently
Screenings
Indepth workup ?
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VNA Level 1 Module 5: Nutritional Assessment
Taking an accurate historyisamongthemostusefulandrewardingdatacollectionprocedures.Evenwhenthereisnoproblemorprimarycomplaint,clientsshouldbequestionedcarefullyusingabodysystemapproach.Acompletehistoryshouldalsoincludequestionsaboutthepet’sweightandmedical,surgicalandothertherapiesthatmayaffectappetite,nutrientmetabolism,orboth.Anaccuratedescriptionofthecurrentfeedingplan,includingthepet’sfood,eatinganddrinkinghabits,andfeedingmethods,shouldbeobtainedfromtheclient.Carefullydetailalldietaryfacts,includingthetypeandbrandoffood,snacks/treats/tablefood,nutritionalsupplements,amountsfedeachday,feedingmethod(e.g.,freechoice,mealfeeding,etc.).
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Assess The Pet
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Assess The Pet
A thorough physical examinationbytheveterinariancanhelpdefineapet’snutritionalstatusaswellasidentifydiseasesthatmayhaveanutritionalcomponent.Thephysicalexaminationshouldtakethesameformasthehistorytaking:bodysystembybodysystem.Table1listssomeofthemorecommonfindingsthatmayindicateanutritionalproblem.
Body Area/System Good Nutrition Poor Nutrition
Table 1. Indicators of Good and poor Nutritional Status.*
Appearance
Coat
oral cavity
eyes
ears
Abdomen
Muscles
Skeleton
pink mucous membranes, no swelling or bleeding, no gum disease
Clear, pink membranes nodischarges, no prominent bloodvassels
Concave
Clean, no discharge Discharges, excessive scratching
Firm
No abnormalities
pale mucous membranes , red mucous membranes, gums that bleed easily , exposed tooth roots, loss of teeth
pale membranes, dry eyes, dis-charges, red membranes, prominent blood vessels
SwollenFlaccid, sore
Conformation problems, early arthritic changes, lameness
Shiny Dull, hair easily lost, greasy, scales
Alert, responsive to environment Listless, apathetic, cachexia
Gastrointestinal function Normal appetite, normal stools
*Other medical conditions that cause these changes should be ruled out first.
Anorexia, vomiting, diarrhea
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VNA Level 1 Module 5: Nutritional Assessment
BodyconditioncanbesubjectivelyassessedbyaprocesscalledBodyConditionScoring(BCS).Ingeneral,thisprocessassessesapatient’sfatstoresand,toalesserextent,musclemass.Fatcoverisevaluatedovertheribs,downthetopline,aroundthetailheadandventrallyalongtheabdomen.
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Figure 7. Canine Body Condition Scoring.
Figure 8. Feline Body Condition Scoring.
Assess The Pet
BCS 1: Very Thin
BCS 2: Underweight
BCS 3: Ideal
BCS 4: Overweight
BCS 5: Obese
BCS 1: Very Thin
BCS 2: Underweight
BCS 3: Ideal
BCS 4: Overweight
BCS 5: Obese
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VNA Level 1 Module 5: Nutritional Assessment
Here’showtousebodycondition(BCS)scoring.Fordogsandcatsalwaysdeterminetheamountoffatcoveringtheribs.Feeltheareasbetweenribstogetthemostinformation.Palpatethetailbaseindogs(areainfrontandtothesidesofwherethetailattachestothebody)andtheareasoverthebackboneandhipbonesincatsformoreinformation.Then,reviewtheprofileoftheabdomenfromthesideandtop.Dogsandcats,whenviewedfromthesideshouldhaveaconcavewaist(alsocalledtuck).Dogsshouldhaveanhourglassfigurewhenviewedfromthetop.Assesstheamountoffatintheabdominalfatpad(alsocalledapron)alongthebottomofacat’sstomach.
Theribsofoverweightcatsanddogsaredifficulttofeelbecausetheyarecoveredwithfat.Overweightdogshaveasmooth-to-thickenedtailbaseandit’sdifficulttopalpatebones.Thebackofobesedogsmaybemarkedlywiderthanusualandthespinemayappearinadepression.Overweightdogsandcatshavelittleornoabdominalwaist.Catswithbodyscoresof4and5havemoderatetomarkedfatdepositsalongtheabdominalwall.
Bodyconditionscoringshouldbeincorporatedintothephysicalexaminationofeachpatienteachtimeitisseen.Thegoalistodetermineifapatientneedstogainorloseweightorifitisatidealweight.Afive-pointsystemcanbeusedfordogsandcats. Bodyconditionscoreof1=Verythin Bodyconditionscoreof2=Underweight Bodyconditionscoreof3=Ideal Bodyconditionscoreof4=Overweight Bodyconditionscoreof5=Obese. Yourprogressissaved. Slide 11 of 26
Body Condition Scoring is one of the most obvious and visible evaluations you can do on a pet in front of the client.
Assess The Pet
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Anthropometryisthesciencethatdealswithbodymeasurements,suchasheight,weight,andproportions.Itisusedtoassessbodyfatandproteinstores.Forexample,inpeople,tricepsskinfoldandarmcircumferencearemeasuredandrecorded.Zoometricsisanequivalentanimalterm.Bodyweightisthemostcommontechniqueusedinsmallanimalpractice.Weightovertimecoupledwithbodyscoringtechniques(palpation)isveryusefulforestimatingfatandproteinstoresinpets.
Youmayapplywhatyou’velearnedaboutbodyscoringandzoometricsinweight-lossprogramsforpets.Forexample,youmightuseatapemeasuretomeasurethecircumferenceofadog’sabdomen(pelviccircumference)immediatelyinfrontofitsbacklegs,intheflankarea.Becausedogsonaneffectiveweight-lossprogramwillloselumbar(back)fatastheyloseweightthecircumferenceshoulddecrease.Likedecreasingbodyweight,adecreasingabdominalcircumferencemeasurementhelpsconvinceclientstheyaredoingagoodjobwithaweight-lossprogramfortheirpet.
Figure 9. Measuring abdominal (pelvic) circumference.
Assess The Pet
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VNA Level 1 Module 5: Nutritional Assessment
Laboratoryandotherdiagnostictestsmaybeusedaspartofthenutritionalassessmentprocess,ifthehistoryandphysicalexaminationsuggestamorein-depthworkup.Nosinglelaboratorytestorotherdiagnosticprocedurecanaccuratelyassessapatient’snutritionalstatus.Routinecompletebloodcounts,urinalysesandbiochemistryprofileshowever,canprovideinsightintothepresenceofmetabolicdisordersandotherdiseases.Lowserumproteinvalues(e.g.,liverandkidneydisease),elevatedglucosevalues(e.g.,diabetes),elevatedlipidlevels(e.g.,hyperlipidemia),decreasedpackedcellvolume(e.g.,anemia),inabilitytoconcentrateurine(e.g.,kidneydisease),andabnormalradiographs(e.g.,skeletaldiseasesofgrowingpuppiesandkittens)arejustafewofthedisordersforwhichdiagnosticassessmentisuseful.
Figure 10. Serum Chemistry Profile. Yourprogressissaved. Slide 13 of 26
Assess The Pet
Species Canine
Breed SexSF
Pet Age12Y
Reported07/23/2012
10:50 AM
Test Requested Results Reference Range UnitsOCCULT HEARTWORM ANTIGENOccultHeartwormAntigenSUPERCHEMGlucose1UreaNitrogenCreatinineTotalProteinAlbuminTotalBilirubinAlkalinePhosphataseALT(SGPT)AST(SGOT)Cholesterol
Neg
36161.06.54.00.10605222239
Neg
70-1386-250.5-1.65.0-7.42.7-4.41-0.35-13112-11815-6692-324
mg/dLmg/dLmg/dLg/dLg/dLmg/dLU/LU/LU/Lmg/dL
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VNA Level 1 Module 5: Nutritional Assessment
Determiningthekeynutrientsofconcernandtheirtargetlevelsisfundamentaltothepracticalapplicationofnutrition.TheAssociationofAmericanFeedControlOfficials(AAFCO)publishesrecommendednutrientprofilesfordogandcatfoods.ThesenutrientprofilesaretheofficialsourcefornutrientinformationfordogandcatfoodsintheUnitedStates.
ThevaluespublishedbyAAFCOaredeemedadequatetomeettheknownnutrientneedsofhealthydogsandcats.Besidesrecommendationsforlowerlimits,AAFCOlistsupperlimitsforcertainnutrientswiththeobviousimplicationthatsomenutrientexcessescanbeharmful.
TheconceptofkeynutritionalfactorsgreatlysimplifiestheapproachtonutritionbecausemostcommercialpetfoodssoldintheUnitedStatesprovideatleastAAFCOallowancesofallnutrients.Thus,ifacommercialfoodisfed,veterinariansandtheirhealthcareteamsneedtounderstandandfocusondeliveringthetargetlevelsforafewnutrients(keynutritionalfactorsornutrientsofconcern)ratherthanallnutrientscurrentlyrecognizedfordogsandcats.Minimizingexcessesisofprimaryconcern.
Figure 11. AAFCO Official Publication.
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The nutrients often of greatest concern are water, protein, fat, carbohydrate, calcium, phosphorus, fiber, and magnesium.
Assess The Pet
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The patient’s nutrient needs serve as the benchmark for assessing the food.
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Keynutritionalfactorsencompassnutritionalriskfactorsfordiseasetreatmentandpreventionbutalsonutrientsthatarekeytooptimizingnormalbodyprocessessuchasgrowth,gestation,lactation,andwork.Thefollowingpointsshouldbeconsideredindeterminingkeynutritionalfactorsandtheirtargetlevels:
•Thepatient’slifestageandphysiologicstate •Environmentalfactorssuchastemperature,housing,andpet-to-pet competition •Thenatureofanydiseaseorinjury •Theknownlossesofnutrientsthroughskin,urine,andintestinaltract •Theinteractionsofmedicationsandnutrients,ifapplicable •Theknowncapacityofthebodytostorecertainnutrients •Theinterrelationshipsofvariousnutrients.
Besidesnutrients,otherfoodcharacteristicsmaybeimportanttoconsider.Thesecharacteristicsmightincludesuchthingsasthefood’sinfluenceonurinarypH,thefood’stexture,andthefood’sproteinsources.
Theprimarygoalofpatientnutritionalassessmentistoestablishthepatient’snutrientneeds,especiallyforthekeynutritionalfactors.
Assess The Pet
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Thecomponentstofoodassessmentinclude:
•Physicalevaluationofthefood •Evaluationofthepetfoodlabel •Evaluationofthefood’snutrientcontentrelativetotheanimal’snutrient needs(keynutritionalfactors) •Determinationofthepresenceorabsenceofspecificfoodcharacteristics.
Physicalevaluationofthefoodcanprovideinformationaboutpackage quality,consistency,andpresenceorabsenceofextraneousmaterials suchashairorbone.Physicalevaluationofthefoodisprobablymostusefulforassessingwhetherornotthefoodhasspoiled
The ingredient panel of the pet foodlabelprovidesgeneralinformationaboutwhichingredientswereusedandtheirrelativeamounts.Theingredientsusedintheproductarelistedindescendingorderbyweight.Theingredientpanelcanbeusefulifspecificingredientsarecontraindicatedforcertainanimalsoranownerhasaningredientconcern.However,thequalityoftheingredientscannotbedeterminedfromthelabelandmuchmisinformationexistsregardingpetfoodingredients.Thenutritionaladequacystatementofapetfoodlabelwillalsorevealwhetherthefoodhasbeenfedtoanimalstosubstantiatelabelclaims.Buttherealproofishowthefoodmeetstheneedsoftheindividualpatient.That’swheremonitoringandlifelong,repeatednutritionalassessmentsbytheveterinaryhealthcareteamarecritical.(Formoreinformation,seetheModuleI.6:PetFoodLabels.)
Figure 12. Example of a commercial canned cat food. Note bone pieces throughout.
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Assess the Food
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VNA Level 1 Module 5: Nutritional Assessment
CommercialpetfoodsthathaveundergoneAAFCO-prescribedfeedingtestsprovidereasonableassuranceofnutrientavailabilityandsufficientpalatabilitytoensureacceptability(i.e.,foodintakesufficienttomeetnutrientneeds).Feedingtestsalsoprovidesomeassurancethataproductwilladequatelysupportcertainfunctionssuchasgestation,lactation,andgrowth.Itisprobablyprudenttochangetoamoreappropriatefoodifthere’sadiscrepancybetweenthelevelsofkeynutritionalfactorsinafoodandananimal’sneeds.SmallAnimalClinicalNutrition,4thed.containsnutrientprofilesforselectedcommercialfoodsandtreatssoldintheUnitedStatesandCanada(SeeAppendicesLandM,andindividualchapters).
Figure 12. Small Animal Clinical Nutrition, 5th ed. Contains authoritative nutritional information
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Assess the Food
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VNA Level 1 Module 5: Nutritional Assessment
Howaclientfeedsapetisanothercriticalfactorinfeedingsuccess.Thereareatleastthreethingstoconsiderregardingfeedingmethods:
Feedingroute Amountfed Howthefoodisoffered(when,where,bywhom,howoften).
Feeding route.Whetherornotthefeedingrouteisappropriatedependsonthepet’scondition.Althoughmostpetsareabletofeedthemselves,orphansandcertaincriticalcarepatientsmayrequireassistedfeeding.
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Assess The Feeding Method
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VNA Level 1 Module 5: Nutritional Assessment
Theamountoffoodbeingfedshouldbedeterminedwhenthehistoryofthepetisobtained.Ifthedogorcatinquestionhasanormalbodyconditionscore(3/5)withnohistoryofweightchanges,itislikelythattheamountfedisappropriate.
Figure 14. Additional feeding recommendations on Science Diet® Adult for dogs.
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Assess The Feeding Method
Amount fed.Thenutrientneedsofapetaremetbyacombinationofthenutrientlevelsinthefoodandtheamountoffoodfed.Evenifafoodhastheappropriatenutrientprofile,iftoomuchortoolittleisconsumed,significantover-orundernutritioncouldresult.Thus,itisimportanttoknowiftheamountbeingconsumedisappropriate.
Figure 13. Syringe-feeding techniques for cat and dog, using Prescription Diet® Canine/Feline a/d®
Label feeding instructions are only meant as starting points and guidelines. Your involvement is important in determining the ideal amount for a pet.
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Assess The Feeding Method
How the food is offered.Theamountfedisusuallyofferedinoneofthreeways:
Freechoicefeeding(dogsandcats) Food-restrictedmealfeeding(dogsandcats) Time-restrictedmealfeeding(dogs)
Free-choice feeding(alsoreferredtoasadlibitumorselffeeding)occurswhenmorefoodthanthedogorcatwillconsumeisalwaysavailable;therefore,theanimalcaneatasmuchasitwants,wheneveritchooses.Withfood-restricted meal-feeding,thedogorcatisgivenaspecific,butlesser,amountoffoodthanitwouldeatiftheamountfedwerenotrestricted.Time-restricted meal-feeding occurswhenthepetisgivenmorefoodthanitwillconsumewithinaspecifiedperiodoftime,generally5-15minutes.Timerestrictedmeal-feedingisoflimitedusefulnessindogsandhaslittleifanypracticalapplicationincats.
Figure 15. The three most common feeding methods for dogs and cats.
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Manydogscaneatanentiremealinlessthantwotothreeminutes.Bothtypesofmeal-feedingarerepeatedataspecificfrequencysuchasoneormoretimesaday.Somepetownerscombinefeedingmethods,suchasfree-choicefeedingadryfoodandmeal-feedingacannedfood.Cannedfoodsandmoisteneddryfoodsleftatroomtemperatureforprolongedperiodscanspoilandarenotappropriateforfree-choicefeeding.
Mostclinicallynormaladultdogsthatarenotlactating,working,orstressedwillhaveasufficientappetite,andthephysicalcapacitytoconsumeallthefoodneededdailyinasingle10-minuteperiod(assumingfoodoftypicalnutrientdensity).Catsarelesslikelytoeattheirentiremealinone10-minutesitting,althoughonceadayfeedingisadequateforthemajorityofhealthyadults.
Methods Advantages Disadvantages Food formsFree choice
Meal fed*
ConvenientEnsures adequate food availabilityMimics natural feeding behavior Quieting effect in a kennel Less dominant animals have a better chance to get their share
Enhances human-animal bondFacilitates monitoring of appetite and food intake Enhances control of food intakeEarly detection of altered appetite Better control of body weight
Overconsumption leads to weight gain and/or obesityDifficult to monitor appetite and food intakeMoist food may spoilLess owner contact
Large meals may result in vomiting Less convenient Three or more meals are needed for nursing cats and dogs, kittens and puppies and debilitated animals Intermediate labor intensive Most knowledge required for food dose calculation
Dry Semi moist
Dry Semi moist Canned
Source: Small Animal Clinical Nutrition, 4th ed.*one or more individual feedings per day, one to two hour availability per feeding.**Dry foods available free choice, canned foods meal fed one or more times daily.
Table 2. Advantages and disadvantages of various feeding methods.
Assess The Feeding Method
Time-restricted feeding
Intermediate control of food dose Some monitoring of appetite possible
Inaccurate control of food intake Risk of obesity similar to free choice Most labor intensive
Dry Semi moist Canned
Combination** Enhances human-animal bond (vs. free choice)
Poor monitoring of appetite and food intakePoor control of food intake Less convenient than free choice
Dry Semi moist Canned
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Afterthepet,food,andcurrentfeedingmethodhavebeenassessed,afeedingplanisformulatedbasedonnutritionalobjectivesthatarerealisticandquantifiable.Thefeedingplanwillguideselectionoffoodandfeedingmethod.Therearetwostepstoformulatingthefeedingplan:
DeterminewhatfoodtofeedDetermineafeedingmethod.
ClickhereforHill’sKeytoClinicalNutrition
Determine A Feeding Plan
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VNA Level 1 Module 5: Nutritional Assessment
Comparingthefood’skeynutritionalfactorstothepet’sneedsdetermineswhethernutrientexcessesordeficienciesexist.Ifthepet’scurrentfoodisadequate(keynutritionalfactorsinbalancewithitsneeds)thenthefoodcurrentlybeingfedisprobablyappropriate.Ifyouandyourteambelievenutrientexcessesand/ordeficienciesexist,thenafoodthatbettermeetsthepet’snutrientrequirementsshouldbefed. Changingfoodsformosthealthydogsandcatsisofminorconsequence.However,vomiting,diarrhea,belching,andflatulencemaybeassociatedwithsudden,rapidswitchingoffoods.Itisprudenttorecommendthatownerschangetheirpet’sfoodoverthecourseof5-7days,astheyincreasetheproportionofnewfoodanddecreasetheproportionofoldfood(Figure16).However,nearlyallpetstolerateaseven-daytransitionperiod. Instructions:Clickonthedaysbelowtoseethepercentageofoldandnewfoodtotransition.
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Determine What Food To Feed
Figure 16. Percentage change in a transition schedule.
Old Food
N ewN ew
N ewFood
Old Old
DAYS 1&2 DAYS 3&4 DAYS 5&6 DAY 7
N ew
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VNA Level 1 Module 5: Nutritional Assessment
Determine the Feeding MethodAsmentionedabove,thereareseveralthingstoconsiderregardingfeedingmethods.Theyincludefeedingroute,amounttofeed,andhowtheamountfedisprovided.
Thefeedingroutewilldependontheabilityofthepettoself-feed.Ifitcannotself-feed,itwillhavetohaveassistancesuchassyringeortubefeeding.
Anestimateoftheamounttofeedcanbeobtainedfromproductinformationsuchasfeedingguidelinesfromtheproductlabel.Theamountfedshouldbeadjustedtoassureanormalbodycondition(3/5).
Howthefoodisprovidedandhowoftenitisprovideddependsonthepet’sconditionandthelifestyleoftheowner.Eachsituationwilldictatewhatmethodismostdesirableinprovidingthefood(freechoice,time-restrictedmealfeeding,orfoodrestrictedmealfeeding).
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Determine What Food To Feed
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VNA Level 1 Module 5: Nutritional Assessment
Thesamestepsinthescreeningprotocolforpatientassessmentshouldbeusedinmonitoring.Thehealthcareteamshouldrecordclinicalsigns,bodyweight,bodyconditionscore,clientcompliance,etc.andmakeanychangesnecessarytooptimizepatientcare.
Petswithspecificconditions,diabeticsforexample,needmonitoringtests,suchasurineandbloodglucoseandketoneevaluations.Petswithmultiplemedicalconditionsoftenrequireseveralpharmaceuticalstohelpmanagetheirconditions.Theeffectsofdrugsonnutrientabsorptionandmetabolismandnutrientsondrugavailabilityneedtobecloselymonitored.
Theentireveterinaryhealthcareteamneedstobeinvolvedinnutritionalassessmentincludingmonitoringpatientprogressandclientbehavioralchanges.Yourinvolvementdramaticallyimprovesthelikelihoodofcomplianceandimprovedhealthforyourpatients.RepeatingthenutritionalassessmentcycleinFigure17eachtimeapetisseenconveystoclientstheimportanceofnutritionandsendsconsistentmessagesthatavoidconfusion.
Ideally, most healthy pets should receive a nutritional assessment 2-4 times a year, more frequently for diseased or injured pets.
Figure 17. The two-step nutritional assessment process.
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Reassessment/Monitoring
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Everyoneontheveterinaryhealthcareteamcancontributetotheunderstandingofeachpet’snutritionalassessment.Thiscanbedoneina“teamwork”approachwhereeveryoneunderstandshisorherrole,andtheroleofothersinprovidingthebestadvicetotheclient,careforthepet,andbenefitstothepractice.
Tocontinue,youwillneedtocompletethequizforthismodule.Whenyouareready,clickontheforwardarrowbelowtotakeyoutothequiz.
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Summary
Are You Ready?
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VNA Level 1 Module 5: Nutritional Assessment