By: Dr. Patrick Davis, University of Missouri Extension...
Transcript of By: Dr. Patrick Davis, University of Missouri Extension...
By: Dr. Patrick Davis, University of Missouri Extension County Livestock Specialist Jeff Yearington, Lincoln University Farm Outreach Worker – West Central Region
Goat Nutrition Forage Quality Feeding Strategies
Goat Digestive Physiology Goat Feeding Behavior Nutrient Requirements
Rumen • Fermentation vat where bacteria and protozoa
break down fiber.
Reticulum • Extension of the rumen, collects heavier
particles.
Omasum • Removal of excess moisture and further
grinding.
Abomasum • Gastric juices and enzymes secreted.
Kid Digestive System
Adult Goat Digestive
System
1 – Rumen; 2 – Reticulum; 3 – Omasum; 4 - Abomasum
Goats are browsers • They eat with there heads up If pasture gets to short that could increase parasite
problems
• Prefer forage diversity Brush/weeds Grass Legumes
Pasture Grazing Systems • Good quality pasture system 6 to 8 goats per acre
• Good brush – browse system 9 to 11 goats per acre
Poisonous plants • Clippings from Yews and rhododendrons • Clippings from cherry, apricot, and peach trees • Plant during certain times of the year Cocklebur
Symptoms of poisoning • Vomiting and death • Call vet immediately
Learn response associated with poisonous plants or bad tastes
Class of nutrients • Water • Protein • Energy • Vitamins • Minerals
All are required
Water • Most important as it is related to intake • Insufficient water intake affects Production Growth General appearance
• Should always have access to high quality source of water
Protein • Source of nitrogen for the bugs in the rumen • Source of amino acids for protein synthesis in
the animals body • Used for Body tissue development Development of hormones and enzymes Milk production
Energy • Primarily comes from carbohydrates Sugars Starches Fibers
• Fats 2.25 times the energy of carbohydrates Sources Animal and plant
No more that 2 to 3% of the ration
Energy • Needed for Growth Reproduction Milk production Health Proper kidding and raising kids
Carbohydrates Fiber and Starch
Protein RDP RUP
Peptides AA NH3
+ Carbons Skeleton
• For animal • Growth • Reproduction • Lactation
• For Microbes • Cell growth • Cell division Sugars VFA
Microbial Cell Microbial Enzymes
Urea Via Urea Cycle
AA Synthesis
Microbial protein for use by animal to meet its needs
Weaning Yearling Gestation LactatingAVG
LactatingHigh Buck
Intake 2 3 4.5 4 5 5
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Physiological states effect on intake of goats
Weaning Yearling Gestation LactatingAVG
LactatingHigh Buck
TDN 68 65 60 60 65 60%CP 14 12 10 11 14 11
0102030405060708090
100
%
Physiological state effects on energy and protein levels required for goats
Minerals • Required in small portion • Macro Ca, Cl, Mg, P, K, Na, S
• Micro Co, Cu, F, Fe, I, Mn, Mo, Se, Zn
• Required Bone formation Construction of muscles, blood cells, internal organs
and enzymes Develop proper immunity to diseases
Weaning Yearling Gestation LactatingAVG
LactatingHigh Buck
Ca 0.6 0.4 0.4 0.4 0.6 0.4P 0.3 0.2 0.2 0.2 0.3 0.2
00.10.20.30.40.50.60.70.80.9
1
%
Goat Calcium and Phosphorus Requirements
Vitamins • Small portion of the diet but essential for life • Required for Normal growth, production, reproduction, fight stress,
disease and maintain good health
Vitamin
Source
Vitamin A Animal conversion of β – Carotene from forage and corn
Vitamin B Developed by microorganisms of a fully functional rumen
Vitamin C Synthesized by animal tissues
Vitamin D Animal conversion of sunlight and sun cured hays
Vitamin E High quality legume hay
Vitamin K Green leafy fresh or dry feedstuffs and rumen microorganisms
Forage quality related to • Fiber • Protein Content
Factors that influence forage quality • Species • Maturity • Plant parts • Post – harvest handling • Storage
Nutritive values of different full bloom hays
Feed stuff NDF (%) TDN (%) CP (%)
Fescue K31 67 58 12.90
Timothy 64.20 56 8.10
Alfalfa 48.80 55 17.00
Red Clover 46.90 55 15.00
Beef Cattle NRC, 2000
Forage Crop Stage of maturity NDF% TDN% CP%
Alfalfa Early Vegetative 33 66 30
Early Bloom 39.30 60 25
Mid Bloom 47.10 58 22
Full Bloom 48.80 55 17
Late Bloom 53.00 53 17
Mature 58.00 50 14
Beef Cattle NRC, 2000
1st bite: leaves with low fiber
2nd bite
3rd bite: stems with high fiber
Body Condition Scoring Flushing Does Managing Goats and Cattle Fescue Toxicity Ration Balancing
Feel fat condition over the backbone, ribs, spine, and loin
Score from 1 to 5 • 1. Emaciated • 2. Thin • 3. Average • 4. Fat • 5. Obese
Does • Breeding 3 • Late Gestation 3 • Kidding 3 or better • Weaning 2
Bucks • Pre – breeding 3 – 4
Use to determine supplementing strategies
Feeding a high energy diet 30 – 40 days before breeding
Increase body weight, ovulation rate and litter size
Poor body condition does respond better • Make sure the does do not get too fat
Strategies • Move goats to high quality lush pasture or feed
½ pound of corn or whole cottonseed per day
Goat first then cattle Goats clean the mature plant growth and
brush away and leave the lush growing forage for cattle
Recommended stocking rate of 1 – 2 goats per beef cow without reducing forage availability
Improve productivity of pastures
Caused by endophyte that lives in the fescue plant • Concentrated in the seed head
Symptoms • poor conception rates, low pasture gains, low
milk production, heat stress, hoof and tail rot • Pregnant Does • Birthing issues Thickening placenta wall making it hard for the kid to
get out of the sack leading to death
Ways to reduce symptoms • Pasture Rotation • Interseed legumes • Supplement with other feed stuffs to dilute effect • Graze or cut fescue before it gets to the seed
head stage
Balance the ration to meet the nutrient requirements of the animal
Forage testing Animal Requirements
• Weanling, Yearling, gestation, average or high lactating doe, and buck
Formulate the ration to meet the energy and protein requirements
Minerals • Feed a free choice complete goat mineral that
fits your animals needs Macro – minerals likely to be deficient Salt (NaCl) Mg Ca and P (ratio 2:1)
Micro – minerals likely to be deficient Cu Zn Se
Vitamins • Usually don’t worry about vitamin B, C, and K • Look at Vitamins A, D, E. Supplement D if the goats are being housed inside
• Use a commercially available complete mix that fits the needs of the animal
Presentation of the Ration Balancing Software from Maryland University By Jeff Yearington • http://www.sheepandgoat.com/ RationMixer