Page 2081 - Cote clinical veterinary advisor dogs and cats 4th

Vitamin A Toxicosis 1039.e5

PROGNOSIS & OUTCOME • Vitamin A is fat soluble; 90% is stored in ADDITIONAL SUGGESTED
the liver and 10% in adipose tissue. READINGS
VetBooks.ir • Chronic: guarded prognosis; bony changes Prevention Puls R: Vitamin A in dogs, vitamin A in cats. In Puls Diseases and Disorders
• Excellent in acute cases
R: Vitamin levels in animal health: diagnostic data
are permanent, and some cats that were fed
Do not overfeed raw beef liver to cats.
and bibliographies, Clearbrook, British Columbia,
only liver may refuse to eat anything else.
1994, Sherpa International, pp 14, 20.
Technician Tips Rader JD: Vitamin A. In Plumlee K, editor: Clinical
PEARLS & CONSIDERATIONS In cats, lameness, weight loss, and stiff ven- veterinary toxicology, St. Louis, 2003, Mosby, p
troflexion of neck should prompt question- 330.
Comments ing about cat’s diet (raw liver in the diet or Vitamin deficiencies and excesses. In Case LP, et
• Vitamin A deficiency is far more common supplementation with cod liver oil). al, editors: Canine and feline nutrition, ed 2, St.
than intoxication. Louis, 2000, Mosby, pp 345-350.
• Dogs can convert beta-carotene into vitamin Client Education Vitamins. In Case LP, et al, editors: Canine and
feline nutrition: a resource for companion animal
A, but cats cannot. Teach owners the value of a balanced diet. professionals, ed 3, St. Louis, 2011, Mosby.
• The amount of vitamin A needed to cause
toxic effects is usually 10-1000 times the SUGGESTED READING AUTHOR: Safdar A. Khan, DVM, MS, PhD, DABVT
dietary requirements for most species for Khan SA: Vitamin A toxicosis. In The Merck Manual EDITOR: Tina Wismer, DVM, MS, DABVT, DABT
several months. Veterinary Manual, Kenilworth, NJ, 2016, Merck
• The vitamin A requirement for cats is & Co., Inc. (website). http://www.merckvetmanual.
10,000 IU/kg of diet fed, with levels up to com/toxicology/toxicities-from-human-drugs/
100,000 IU/kg of diet tolerated. multivitamins-and-iron-toxicity
• For dogs, the requirement is 3333 IU/kg of
diet fed, with up to 33,330 IU/kg of diet
tolerated.

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