Cat threw up and was very lethargic. Histoplasma was negative and GI panel was normal. Temp was 1-2 above where it would be. After vet visit, wouldn't eat hardly anything for 3-4 days (no further vomiting during this time and temp was normal) - until we switched her to a Royal Canin Vet diet (PR), which she eats great. But, at almost $100/9!pound bag, that's not going to be something I want to do long term with 2 other cats.

Advice? Another non-RX food I could try? Already consulting with primary vet and emergency vet to find a cheaper food cause I don't want to continue that long term.