my cat is 5 yrs. she has always thrown up. sometimes after meals or at a random time. could happen none at week and sometimes 3x a week. she never has any other problems, eats, drinks, poops normally. she was on purina one indoor then switched her to the sensitive one. it didnt work. i then switched her to science diet sensitive but so far no changes. in the 3 and half weeks of being on this food so has thrown up 5x. which is about what it was before. i stop treats, started purified water(used to give her tap) but nothing. the fact she doesnt get any other symptoms, is why i havent gotten her to get any test. ive been told its normal and its not normal. any one have gone through this? also, the vet recommended famotidine. but i've read horror stories about cats taking that.