I'm really sorry for resurrecting this thread, but...I feel very strongly on this topic.
I myself am vegan, somewhat lapsed because I was just diagnosed last weekend after a fainting spell as being anemic, and therefore I have to eat small amounts of dairy and seafood maybe in the coming weeks, but that's totally off-topic.
Anyway, I'm vegan because I believe for myself, that the meat and dairy industries are terrible for the animals involved. I also think the additives in both are apalling, and therefore have chosen to abstain from animal products.
That's my choice. I won't buy or prepare any animal products, but my BF tends to bring and cook his own, and that's fine. Veganism is certainly not for everyone.
My cats can't choose. In fact, they're hard-wired to be meat-eaters. With my main goal to be compassionate to animals, I can't deny them the meat the they need to survive. Granted, I buy meat that comes from a good source and promotes sustainable agriculture and good animal husbandry practices. But I would never, ever deny my kits their meat.
I think it goes against the vegan aim of animal welfare advocacy.