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ที่มา http://www.petco.com/Content/ArticleList/Article/33/2/256/Dangerous-Supplements-for-Cats.aspx
Dangerous Supplements for Cats
Your cat has a peculiar body system that seems almost (cover your cat's ears) deficient at times. He needs many vitamins and minerals that his body, unlike, say, a dog's, is unable to produce. Supplementing with vitamins seems like the way to go; how can giving him a heap of healthy vitamins be bad? In practice, however, vitamin over-supplementation can bring on a multitude of health problems.
Vitamin A
Vitamin A is a fat-soluble vitamin that comes in two forms, beta-carotene and retinol. Beta-carotene is mostly found in plant matter, and retinol is mostly found in animal matter. Curiously, cats can't convert beta-carotene to vitamin A as humans can; their only source of vitamin A is retinol.
Some places your cat will get vitamin A include liver, egg yolk, butter, fish liver oil and kidneys.
Because vitamin A is fat-soluble, it lingers in your pet's body for a long time, so it is easy for your cat be overdosed, causing hyper-vitaminosis A. When this illness occurs your pet's spine begins to harden, a painful condition that has the following symptoms:
* Difficulty walking
* Muscle degeneration
* Pain in the legs and body
* Stiff neck
* Loss of appetite
The stiff neck is usually the first sign that something is wrong with your pet; you will notice that he has problems grooming himself. This condition must be treated immediately -- if it is left for too long, the spine will eventually harden permanently and he will be unable to move.
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1 ธ.ค. 53 23:38:19
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