OK, so this is purely to win an argument :tongue2:. Some guy on my dog forum said he gives his dog 100,000 IU of vitamin A daily, I said that isn't safe, as the tolerable upper limit for humans is 10,000 IU daily and dogs are smaller than humans. He said that dogs, as carnivores, have a much higher tolerance for vitamin A and there has never been a reported case of vitamin A toxicity in dogs. So I figured, if that's true of dogs, it should be true of cats, too, since they're even more carnivorous than dogs.
So, what's the research? Is there any proven upper tolerance limit of vitamin A for cats? Any reported cases of toxicity? I know that in one thread it was determined that you would need to feed "a lot!" of freeze-dried liver before it became an unsafe amount, but other than that I don't remember any discussion on vitamin A toxicity.
So, what's the research? Is there any proven upper tolerance limit of vitamin A for cats? Any reported cases of toxicity? I know that in one thread it was determined that you would need to feed "a lot!" of freeze-dried liver before it became an unsafe amount, but other than that I don't remember any discussion on vitamin A toxicity.
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