Nutrition Deficiencies in Horses
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Questions and Answers

What is a potential consequence of selenium deficiency in working horses?

  • Increased energy levels
  • Enhanced reproduction
  • Improved mane and tail growth
  • Rhabdomyolysis (correct)

    • Which of the following is NOT a symptom of vitamin A deficiency?

  • Increased muscle mass (correct)
  • Deformed hooves
  • Nyctalopia
  • Capricious appetite

    • What is a critical role of Vitamin E in horses?

  • Bone calcification
  • Milk production
  • Antioxidant function (correct)
  • Energy production

    • What condition may be prevented by adequate sunlight exposure for horses?

    <p>Vitamin D deficiency</p> Signup and view all the answers

    What is a consequence of prolonged confinement of young horses with limited sun exposure?

    <p>Reduced bone calcification</p> Signup and view all the answers

    How can excess selenium affect horses?

    <p>Sloughing of the hoof</p> Signup and view all the answers

    Which symptom is NOT typically associated with vitamin A deficiency?

    <p>Irritability</p> Signup and view all the answers

    What is a risk factor for developing vitamin E deficiency in horses?

    <p>Aggressive antibiotic treatment</p> Signup and view all the answers

    Which symptoms are associated with selenium deficiency in horses?

    <p>Muscle tremors and ataxia</p> Signup and view all the answers

    What are possible symptoms of vitamin A deficiency in horses?

    <p>Night blindness and poor coat condition</p> Signup and view all the answers

    Why is vitamin E considered important for horses?

    <p>Supports muscle function and antioxidant protection</p> Signup and view all the answers

    What is a common effect of vitamin D deficiency in horses due to lack of sunlight exposure?

    <p>Bone weakness and deformities</p> Signup and view all the answers

    Which condition is linked to thiamine deficiency in horses?

    <p>Weakness and neurological issues</p> Signup and view all the answers

    What are the effects of zinc deficiency in foals?

    <p>Reduced growth rate and skin lesions</p> Signup and view all the answers

    What happens with an excess intake of copper in horses?

    <p>It interferes with selenium and iron metabolism</p> Signup and view all the answers

    What is a symptom of iron excess in horses?

    <p>Microcytic, hypochromic anemia</p> Signup and view all the answers

    What are the clinical signs associated with thiamine deficiency?

    <p>Anorexia and incoordination</p> Signup and view all the answers

    Which condition is a disease directly related to nutrition?

    <p>Obesity</p> Signup and view all the answers

    What impact does zinc deficiency have on foals?

    <p>Reduced growth rate and alopecia</p> Signup and view all the answers

    Which vitamin deficiency is associated with a critical role in muscle health?

    <p>Vitamin E</p> Signup and view all the answers

    How can clinical signs of deficiencies be addressed in horses?

    <p>With supplementation and sunlight exposure</p> Signup and view all the answers

    Which condition is indirectly related to nutrition?

    <p>Polysaccharide Storage Myopathy</p> Signup and view all the answers

    What is an effect of excessive zinc intake in young horses?

    <p>Developmental orthopedic disease</p> Signup and view all the answers

    Which of these conditions is a combination of directly and indirectly related to nutrition?

    <p>Laminitis</p> Signup and view all the answers

    Study Notes

    Selenium

    • Selenium deficiency leads to decreased serum selenium levels and increased AST activity, resulting in white muscle disease and potential rhabdomyolysis in horses.
    • Excess selenium, even at low levels (5 ppm), can cause loss of mane and tail hairs and sloughing of hooves.

    Vitamins

    • Vitamin A Deficiency

      • Results from feeding dried, poor-quality roughage over time.
      • Symptoms may take months to manifest; includes nyctalopia, keratinization of the cornea, pneumonia susceptibility, incoordination, and deformed hooves.

    • Vitamin E

      • Highly labile, quickly lost during storage in feeds and hays.
      • Acts as an important antioxidant; deficiency linked to rhabdomyolysis, impaired immunity, reproductive failure, and ocular lesions.

    • Vitamin D

      • May not develop deficiency if horses consume sun-cured hay or are exposed to sunlight.
      • Prolonged confinement can lead to reduced bone calcification, joint stiffness, irritability, and low serum calcium/phosphorus levels.

    Minerals

    • Magnesium

      • Deficiency in foals fed low magnesium diets results in hypomagnesemia, nervousness, tremors, ataxia, and possible death.
      • Common feeds typically exceed the 70-100 mg/kg dry ration recommendation.

    • Iron

      • Deficiency often arises from parasitism or chronic blood loss, leading to microcytic, hypochromic anemia.
      • Excess iron can disrupt copper metabolism, also causing anemia.

    • Zinc

      • Deficiency in foals characterized by reduced growth, anorexia, skin lesions, and low alkaline phosphatase activity.
      • Excessive zinc (>1,000 ppm) linked to developmental orthopedic disease.

    • Copper

      • Low blood copper levels may be associated with uterine artery rupture in older mares.
      • Deficiency can lead to aortic aneurysm and improper cartilage formation; excess can interfere with selenium and iron metabolism.

    Thiamine

    • Thiamine deficiency leads to anorexia, weight loss, incoordination, and elevated blood pyruvate, often seen in bracken fern poisoning.
    • Natural diets generally provide sufficient thiamine, but stress may increase requirements.

    Equine Nutritional Diseases

    • Nutritional diseases can negatively impact horse performance and health.
    • Categories include:
      • Directly related to nutrition: preventable with proper diets (e.g., Obesity, White Muscle Disease).
      • Indirectly related to nutrition: management through nutrition but not preventable (e.g., HYPP, Insulin Resistance).
      • Combination diseases: involve both direct and indirect factors (e.g., Laminitis, Equine Colic).
    • Obesity
    • White Muscle Disease
    • Developmental Orthopedic Disease
    • Mycotoxicosis
    • Nutritional Secondary Hyperparathyroidism (NSH)
    • HYPP
    • Insulin Resistance
    • Enterolithiasis
    • Polysaccharide Storage Myopathy (PSSM or EPSM)

    Combination Diseases

    • Laminitis
    • Equine Colic
    • Equine Gastric Ulcer Syndrome (Equine Ulcers)

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    Related Documents

    LEC 9 - NUTRITIONAL DEFICIENCIES.pptm

    Description

    This quiz covers the nutritional deficiencies related to selenium and vitamins in horses. It explores the effects of selenium deficiency such as increased AST activity and risks associated with excess intake. Additionally, it addresses vitamin A deficiency and its implications when inadequate roughage is fed.

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