My brother's cat, Yogi, a 2 year old tabby, is slowly recovering from a nasty bout of URI **yeah!**. My brother is worried because although he is recovering, is it so slow. He was considering mashing a vitamin C tablet into a strongly flavored wet food for Yogi -- he asked me if I thought it was a good idea. I'm dubious, but unsure. I kind of thought vitamin E would be more helpful.

Does anyone have experience with either of these vitamins and their effect on cats? I know that tomatos, onions, and chocolate are bad for cats. What about vitamins designed for humans?

Concerned 'auntie'