DSCI 333 Quiz 2

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kderaad
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294897
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DSCI 333 Quiz 2
Updated:
2015-02-05 14:11:39
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DSCI 333
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DSCI 333 Quiz 2
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  1. Quiz Topics
    • DCAD diets
    • Transition cow management
    • Metabolic Diseases
  2. Amount of Dry Matter for Transition Cow
    30lbs of dry matter
  3. Transition period
    3 weeks before to 3 weeks after calving
  4. Two ways cow can get calcium into blood/system:
    • metabolized from bones
    • can inject from feed
  5. DCAD diet
    • Dietary Cation Anion Diet
    • Anion Feed is chlorine based
    • Body produces Ca+ to cope with low pH
    • Don't want BCS to change during Dry period
  6. Signs of Inadequate Transition Management
    • High incidence of metabolic disorders
    • Poor appetites, low dry matter intakes
    • Acidosis problems (too much acid)
    • Rapid loss of BCS in the first month post-calving
    • Less milk per cow
    • Broken cows are a hue cost
  7. Three keys to transition period
    • 1. Encourage Feed Intake
    • 2. Minimize Stress
    • 3. Minimize Infection Challenge
  8. To avoid problems with transition period
    maintain dry matter intake during the final ten days prior to parturition
  9. Allelomimetic
    • means they like to perform the same activity at the same time every day
    • can be disrupted by overstocking
    • Good stocking ratio=80-85% for close up
    •          90% or less for milking cows
  10. Overcrowding leads to Antagonistic interactions between cows:
    • Physical Interaction:
    • -butting
    • -pushing
    • -fighting
    • Non-physical interaction:
    • -threatening behaviors
    • -avoidance behaviors
  11. Overcrowding in close up pens leads to:
    decrease in dry matter intake
  12. Feeding Close-up cows
    • Goal is to minimize drop in DMI
    • -DMI>30lbs for cows, 24lbs for heifers
    • Close-up cows
    • -Monitor DCAD diets measure urine pH
    • -Monitor energy and proein
    • -Feed 1500 IU/day of vitamin E
  13. Rumen Acidosis
    Abrupt ration change to high grain diet may lead to a disaster because no lactic acid utilizing bacteria
  14. What do wet conditions cause
    Mastitis and Metritis
  15. Metabolic Diseases
    • Milk Fever
    • LDA
    • Ketosis
    • SARA
  16. Milk Fever
    • Low blood calcium at or near calving
    • Imbalance between Calcium into and out of body
    • Calcium needed for proper muscle function
    • Intracellular Calcium
  17. Milk Fever Prevention
    • Avoid excessive body condition
    • Monitor calving pens closely
    • Feed low potassium forages and balance for DCAD
  18. Milk Fever Treatment
    • Acute Case: IV calcium
    • -infuse over 30 minute period
    • Subacute
    • -oral or sub cutaneous gels, pastes
    • -Vitamin D shot
    • -Synthetic PTH (consult vet)
  19. Displaced Abomasum (DA)
    • Left displaced abomasum assumes an abnormal position on left side of rumen between rumen and body well
    • 50-80% will occur within 2 weeks post partum
    • 90% occur within post partum
    • Sounds like a basketball when flicking
  20. Preventing DA
    • Feeding and management practices that prevent other post partum disorders reduce the risk of LDA.
    • Dry Matter Intake as an LDA risk factor
    • -lower rumen fill
    • -Reduced F-C ratio is non-TMR herds
    • Higher Forage Diets will reduce chances of DA
  21. DA Treatment
    equipment used to flip abdomen
  22. Ketosis
    • Happens after DA and Milk Fever
    • Inadequate blood glucose
    • Symptoms
    • -Decreased feed intake
    • -Lethargy or nervousness
    • -Increased ketones in blood, urine, milk, breath(like nail polish)
  23. Preventing Ketosis
    • minimize body fat mobilization
    • -watch concentration of non-esterified fatty acids (NEFA) as indicator of fat mobilization
    • Provide rumen with propionate to make glucose
  24. SARA
    Causes
    • Sub acute Ruminal Acidosis
    • Grain overload
    • caused by ingestion of excessive quantities of highly fermentablecarbohydrates-> lactic acidosis
    • Grains that contribute: most finely ground grains, brewers grains, distillers by-products
  25. Clinical signs of of SARA
    • uncoordination
    • weakness, depression
    • anorexia
    • Rumen stasis
    • Abdominal pain
    • -grunt , grind teeth
    • Dehydration w/in 24h
    • Diarrhea
  26. Prevention of SARA
    • Avoid sudden, drastic dietary changes
    • Regular quantities of ration at regular intervals
    • Adequate roughages
    • Ionophore products including Monensin(rumensin Lasalocid
    • Buffers (sodium bicarbonate)

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