A few days ago, one of my cats (5 months old) started vomiting her food and stomach liquids. She seems to mainly vomit during the night. Two days ago, I brought her to the vet. They did an x-ray, but couldn't see anything in her stomach.
The night after the vet visit, she didn't vomit. I only gave her a very small quantity of food. I usually free feed the cats, but have changed to 4-5 small meals for the time being. Tonight she had vomited again. This time, it seems that she only threw up her food (no second puddle of stomach liquid or anything). She generally seems to eat and drink quite a lot, at least compared to my other cat. My first thought was that she ate/drank too much, and the dry food expanded in her stomach and made her throw up. However, since this didn't happen in the last 2 months, I'm not really sure if that is actually the cause, especially because I gave her less food during the last 2 days. So the timeline looks something like this:
- Night 3 days ago: vomit.
- Night 2 days ago: vomit.
- Night 1 day ago: no vomit. This is the day I brought her to the vet. That being said, she had vomited multiple times, mainly clear liquid during the day/before the vet visit.
- This night: vomit.
At this point, I'm not really sure what to do. The only thing that I changed recently is the litter. But I can't imagine that being a problem. Aside from that, nothing changed at all. Same food, didn't move or have big changes in the house either (so not stress induced I think). My other cat, which is 2 months older, is absolutely fine. The vet said to give a call in case she vomits again. She said if that's the case, we'd probably need to do an ultrasound to check the stomach again (last time, she did an x-ray). I haven't called her yet.
About their diet:
Currently I'm giving both kittens only dry food. The reason being: the same cat that is vomiting right now had diarrhea for a few days after I first brought her home. This was around 4 weeks ago. I had her checked at the vet, and got told to only give her dry food for the whole month, to make sure her stomach stabilizes. I was planning on switching to free-feeding dry food and 1 wet food per day, but I guess that plan must wait for now. The vet thinks it was stress induced. Her stomach/stool has been fine for the past 3 1/2 weeks.
Edit: One other thing that crossed my mind is her maybe having parasites or worms. The cats are not allowed to go outside, however, they both love to play with my shoes. I think it's unlikely, but I guess there is a possibility that maybe she got something from the shoes? I started stowing them away the last few days, just in case.
Any advice is welcome. Thanks.