I managed to transition my picky cat into commercial raw (Darwin's lamb, Natural Pet Pantry, Wild Coast Raw) but I don't feed it exclusively; usually my cats get raw during the week and canned on weekends (Rawz, BFF, American Journey, Instinct). However one of them started vomiting occasionally, and after observation the pattern emerged: she vomits when coming back to canned, but also she vomits when back to raw. So whenever she eats raw for weeks, she is fine, and whenever she eats canned for weeks, she is also fine, but as soon as I give her the other type of food, she vomits, usually first or second meal after the change (they eat 5 smallish meals a day), up to half an hour after eating. Does it ever happen to your cats? I remember reading something about different PH in the stomach when on raw food, if anyone can point me in the right direction, article, post, I'll be grateful. Also, do you have any ideas on how to mitigate this? I'd feed them raw only but my trusted pet sitter is reluctant, that's why they get canned. Also, sometimes it's simply convenient to give them cans. Maybe different pattern would work better, eg. if they get fed both raw and canned everyday? I'd appreciate any insight and your experience!