I’m honestly at a loss and really need help or ideas.

Back in February 2024 my cat started vomiting. Shortly before that time she had urinary stones, she was on the tiki cat food so she got switched to a prescription diet to prevent them. After a few months on that food, she started throwing up constantly.

I took her to the vet and they didn’t really have answers. Labs were normal. So I switched her to a limited ingredient food. That worked for a few months then she started throwing up again.

This has basically been the cycle for over a year now:

•switch food

•she does good for a few months

•then randomly starts vomiting again

She doesn’t get lethargic or have any other symptoms she’s an indoor cat does not have FIV. 

I’ve gone through multiple foods:

•prescription kidney food- hills 

•limited ingredient dry

•another vet-recommended food

•limited ingredient wet (chicken) weruva 

•very expensive limited ingredient lamb Ziwi peak 

•now she’s on even more expensive limited ingredient rabbit

The first few times I would do a controlled switch, but it was some of her old food some of her new food but then when she started dropping weight, it became time sensitive, so I would just switch the food because she wouldn’t even eat the old food and if I tried to do a controlled switch, she would pick out the new food and eat that only and leave the old food. 

Each time it works for a while, then it doesn’t.

The rabbit one actually lasted the longest, like \~7 months. I thought we finally figured it out. But now in the last 2 days she’s thrown up 14 times.

I keep taking her to the vet every time this happens and they have no answers.

•Bloodwork: normal

•Ultrasound: normal

•Everything they’ve checked comes back normal

They tried giving her a probiotic (I think it was FortiFlora) and it made her way worse vomiting + diarrhea within a couple hours.

I don’t feed her any human food at all, even though she wants it, because I know it’ll make things worse.

At one point during all of this she dropped from 15 lbs to 8 lbs in like 2 months because she couldn’t keep food down. She did gain weight back once things stabilized, but this keeps happening over and over.

I’ve probably spent around $5k at this point and I still have zero answers.

I’ve even tried getting her allergy tested, and that didn’t work out. I’ve changed so many things in my house there’s nothing toxic she can get into I don’t use any fragrances her food is on a safe place. 

Last night she was throwing up nonstop. I didn’t sleep. I’m exhausted and honestly really worried about her

Has anyone dealt with something like this where everything is “normal” but the cat just keeps vomiting in cycles? I feel like I’m missing something but I don’t know what else to try.

TLDR: my cat just keeps throwing up regardless of food or any efforts. 

Required info not a minor in USA vet is accessible got her in 2019 and she was 2-3 she could be 8-9 years old  female cat spayed. Can afford vet care. 

Chronic vomiting, normal labs, tried everything. I don’t know what to do anymore