My 6 year old aussie was raw fed for his first 4 years, and off and on for the past 2. We've always had allergy issues and after much experimentation I finally figured out he's allergic to chicken/turkey. I hate to say it, but I can't afford to feed him beef or lamb all the time, esp since moving to CA. (Everything costs so much more here!) So now he's on Solid Gold. I'm still trying to find other foods that don't make his skin itch.
I also fed our older cat raw for some time, but he had a nasty habit of flinging his chicken wings across the room,
then only partially eating them. The other cat refused to eat any raw food I gave him.