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Sheep

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Ansci 520 Dr. Dan Morrical Iowa State University Sheep vs goats vs cows Intake Rate of passage Physical attributes Production levels and gestation ex. Growth rates ... – PowerPoint PPT presentation

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Title: Sheep


1
Sheep Goat FeedingAnsci 520
  • Dr. Dan Morrical
  • Iowa State University

2
Sheep vs goats vs cows
  • Intake
  • Rate of passage
  • Physical attributes
  • Production levels and gestation
  • ex. Growth rates

3
Very picky eaters
  • Process roughage or
  • feed very high quality
  • Goats, extreme sorters
  • pellet rations to prevent sorting

4
Sheep vs goats vs cows
  • Grass Forbs Browse
  • Sheep 50 30 20
  • Cattle 70 15 15
  • Goats 30 10 60
  • Van Dyne et al. 1980
  • Impact supplementation stratgedies

5
Young Lambs
  • Enterotoxemia
  • Clostridium perfringens type C
  • Symptoms
  • Sudden death in 7-21 day old lambs

6
Young Lambs....continued
  • Prevention
  • Booster dams in late gestation
  • Vaccinate lambs at 21 days and weaning
  • Orphan vaccination
  • Maximum colostrum intake
  • Misdiagnosed-selenium/Vit. E deficiency or
    pneumonia

7
Purchased feeder lambs
  • Assume no grain exposure
  • Assume no vaccinations
  • Vaccine is highly effective
  • Feed company approach
  • lower energy diets

8
Goiter
  • Symptoms
  • Enlarged thyroid
  • Poor wool coat at birth
  • Low vigor/survival

9
Goiter.....continued
  • Prevention
  • Iodized salt
  • Compensate for goitergens (kale, brassicas, etc.)
  • New NRC .8 PPM instead of
  • .1 to .8 range

10
Finishing Lambs
  • Enterotoxemia/Overeating
  • Symptoms
  • Best doing lambs
  • Uncoordinated movement
  • Rapid death

11
Finishing Lambs...continued
  • Prevention
  • Vaccination - toxoid
  • Bunk management
  • Gradual ration changes
  • Antibiotics
  • Misdiagnosed-polio and
  • Vit. E/Se deficiency, pneumonia

12
Urinary Calculimuch more important, why
  • Wether lambs and stud rams
  • Several types-phosphate, calcium, silica
  • Problem-concentrates are
  • low in Ca and high in P

13
Urinary Calculi...continued
  • Prevention
  • Water intake
  • Salt (.5 to 1 of ration)
  • Ammonium chloride or sulfate
  • Add calcium to achieve gt1.51 ratio to
    phosphorous
  • Never add phosphorous
  • New NRC

14
White Muscle/Stiff Lamb Disease
  • Symptoms
  • Stiff rear legs and arched back
  • Sudden death
  • Aspiration Pneumonia
  • Poor suckling reflex
  • Poor reproduction

15
White Muscle/Stiff Lamb Disease...continued
  • Cause
  • Deficiency of Vit. E and/or Selenium
  • Note Se is toxic but Vitamin E is not and
  • E is also cheap
  • Feds control how much Se, .69 mg/h/d
  • High grain rations reduce Vit. E activity
  • Newborns only source of E is milk
  • New NRC increased E levels 5 times

16
Results - Serum E ewes
  • Con E-G E-L E-GL
  • Pretreatment 1.27 1.26
  • Pre-lambing 1.51a 1.91b
  • Post-lambinga .93a 1.13b
  • Mid-lactation .97a .95a 1.28b 1.37b
  • Milk e at 3 days 10.8 15.1
  • a,b Row means with different superscripts differ
    (plt.05).

17
Results - Serum E lambs
  • Con E-G E-L E-GL
  • 3 days 1.08 1.08
  • 28 days .41 .38 1.33 1.33

18
Polioencephalomacia
  • Thiamine deficiency
  • Prevention
  • Maintain rumen health
  • Gradual ration changes
  • Feed some long fiber
  • Sulfur intake
  • Less risk than cattle

19
Copper Toxicosis, sheep
  • Breed susceptibility
  • Mineral interactions-Mo Su,
  • along with high Zn Ca
  • Iowa Feedstuffs
  • Normal copper, low molybdenum

20
Copper Toxicosis...continued
  • Prevention
  • Sheep specific feeds
  • No additional copper
  • Feed some Mo
  • Copper Molybdenum
  • are both toxic
  • Goats use beef mineral

21
Copper Feed mill precautions
  • SOPs
  • What would they be?
  • 1. Liability insurance

22
Pregnancy Toxemia
  • Cause - Excess fat catabolism and ketone
    accumulation
  • Prevention
  • Over conditioned ewes
  • Increased conc. feeding LG
  • coops add molasses ???
  • Fetal scans
  • Pre-lambing shearing

23
Pregnancy Toxemia...continued
  • Treatment
  • Propylene glycol
  • Induced parturition
  • Severe cases usually do not recover
  • why ?????

24
Grass Tetany
  • Hypomagnesia
  • Cause excess potassium
  • Lactating ewes on lush, spring pasture
  • N fertilization increases risks
  • Stress induced

25
Grass Tetany...continued
  • Magnesium oxide in mineral
  • poor palatability.
  • Sudden death-confirmation by necropsy

26
Milk Fever
  • Ewes vs. Dairy Cows
  • Cause
  • Calcium deficiency ??
  • Stress induced

27
MIlk Fever...continued
  • Late gestation ewes carrying triplets
  • Symptoms
  • Depressed, lethargic, recumbent
  • Treatment
  • Calcium gluconate
  • Rapid response

28
Wool Pulling
  • Cause
  • Inadequate dry matter intake
  • Small particle size, effective fiber
  • Low phosphorous intake

29
Wool Pulling...continued
  • Prevention
  • Maximum 50 concentration ration
  • Improved feeding technique
  • Offer some low quality, long forage
  • Evaluate phosphorous level

30
Summary
  • Common sense eliminates most disorders
  • Shepherd mistakes creates a lot of the disorders
  • Seek advice if not sure of what you are doing
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