So we have two cats a stripped tiger and her black cat sister, litter mates from the same mother. In addition to dry food (Science Diet) by mother hand makes them wet food from chicken breasts, turkey thigh and chicken pureyed into a pattee that we reheat and give them that twice a day once in the morning and once in the evening, they have access to the dry food all day long.
The tiger has a tendency to puke on the regular, often times fully or semi undigested cat food, rarely foam. The black one almost never pukes and when she does it's a hairball. The tiger puking is sometimes multiple time a week to only once a month, she is also a picky eater, far more then her sister.
Recently the tiger stopped eating, this can happen now and again but it never lasts more then one or two meals and kept throwing up. We took her to a vet and got an X-ray, it was clean no blockages or lumps in places, just some stool she couldn't pass. Got meds to help her pass the stool and changed her cat food to a kind we normally don't (Meow Mix) she started eating right away, but puked a little foam just once more. After that she passed some very hard stool and was back to normal, no more puking.
Now we are noticing our black cat who has no such issues starting to puke foam, but thus far is still passing stool and eating normally. Could this a be a virus of some kind and contact with each other or the stool passed it from one to another? The vet tech said it might have been old dry food, we buy the big bags to save money but she said that the big bags sit longer and I know for a fact my local supermarket doesn't rotate stock (source: I did overnight stocking there for a while).
Any feedback is appreciated, we'll be taking the black one to the vet if she ends up not eating for too long.
EDIT: Dad is convinced it's the fumes from my mother's E6000 hobby glue she uses to make her jewelry art. Something about he read it makes stool hard in animals? I don't know I can't find any sources about it.