feeding for sound growth
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Feeding for Sound Growth. Major concern – Developmental Orthopedic Disease Bone & joint disorders Enlargements and deformities of: Fetlocks, knees, hocks Faster growing, earlier maturing, larger horses more susceptible. Nutritional Causes of DOD. 1. Fast growth rate, large body size

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feeding for sound growth
Feeding for Sound Growth
  • Major concern – Developmental Orthopedic Disease
  • Bone & joint disorders
  • Enlargements and deformities of:
  • Fetlocks, knees, hocks
  • Faster growing, earlier maturing, larger horses more susceptible
nutritional causes of dod
Nutritional Causes of DOD
  • 1. Fast growth rate, large body size
  • 2. Excess energy intake
  • 3. Slow growth followed by rapid growth
  • 4. Mineral imbalances
    • Low Ca, Low P, High P
    • Low Cu, Low Zn
feeding practices that cause dod
Feeding Practices that Cause DOD
  • Grain inadequate in P, Cu, Zn when feeding alfalfa
  • Grain inadequate in lysine, Ca, P, Ca, Zn when feeding grass hay
  • Excessive amount grain
  • Over-feeding young horses in poor condition
slide4
Ca & P
  • Ratio important – 2:1 in diet
  • Adults < 6:1, growing < 3:1
  • Bran – low Ca, high P (1:13)
  • Grains – low Ca, high P (1:5 to 1:10)
  • Hays – high Ca, low P (5:1 to 1.5:1)
slide5
Ca & P
  • Deficiency Ca and/or P can cause bone mobilization, developmental orthopedic disease
  • High P – interferes with Ca
  • High Ca – interferes with P, Zn
cu zn
Cu & Zn
  • Critical for normal bone growth
  • Cu and/or Zn deficiency = DOD
  • Cu excess = death
  • Zn excess = Cu deficiency, DOD
cu zn1
Cu & Zn
  • Growing horses

Cu = 150 mg/d or 25 ppm

Zn = 450 mg/d or 75 ppm

  • Adults

Cu = 150 mg/d or 15 ppm

Zn = 450 mg/d or 45 ppm

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