Sorry, having a snake I'm a little hardened to this sort of thing. Has to be said, a lot of the mice/rats etc are purpose bred for this just as our meat is. I'm assuming everyone who is protesting against this is a strict vegetarian?
I don't value those animals any less but I do recognise there's a need for them as food for other animals, and if people feel that their cat will benefit from the nutrients given I don't see what's different between that and raw feeding.