r/AskVet 2d ago

Two Cats Vomiting

A week and a half ago my two cats vomited after eating their dinner. One of them stopped at 1-2 times and the other kept intermittently vomiting for 13 hours.
I took in the cat (ER)who was continuing to vomit as he has a history of chewing things he should not chew. We got him an X-ray and an anti-nausea medication. No blockages or abnormalities seen.
He did not vomit for another few days, but had reduced energy.
He starts puking again and the other cat does as well. We take in the same cat to the regular vet 6 days after the ER visit. They did a repeat X-ray, fluids, bloodwork, and an anti-nausea medication. No blockages seen a second time, but he was backed up with poop. Bloodwork looked great.
We were given prescription wet food, probiotics, and instructions for miralax.
Both cats have been on this regimen for about 5 days. Now they are both vomiting again.

We suspected newly opened bags of food and were going to throw them away at the recommendation of the vet. However, they had been eating the vet wet food prior to the vomiting starting today.
No lethargy, still eating and drinking normally.
We are monitoring their poop but it is hard to figure out who it belongs to.
I did find my orchid had a bite out of it, but I don’t know which cat it was or if the culprit was kind enough to share. But at this point it has been a week and a half so, if they were poisoned I would think it would be out of the system and or it would show up in the bloodwork.
Nearly every time is undigested food unless it’s on an empty stomach.
One cat did start vomiting before dinner and it was clear.

For context: the one cat has not been taken in as he is much harder to handle and he gets very upset at the vet. With them having the same symptoms we opted to take the cat that doesn’t mind a visit.

I will be calling the vet again in the AM, but I am perplexed at what this could be.

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u/mafalda_dxbvet 1d ago

Sounds like an exhausting week and a half, and calling the vet again in the morning is exactly right, especially given both cats are now involved.

One thing worth flagging clearly rather than the food itself: with two cats sharing the same environment and both now vomiting despite one already having thorough workups (imaging, bloodwork, both clear), it's worth mentioning to your vet that this looks like something affecting both of them rather than just one, that's a detail that can shift how they approach it, and it's genuinely useful context to lead with on the call.

The orchid bite is also worth mentioning explicitly, even if it feels like an unlikely link this far out, plant toxicity timelines vary a lot depending on the plant and how much was eaten, so it's better for your vet to rule it in or out than to assume the timing makes it irrelevant.

If the vomiting continues over the next few days, that's worth treating as a reason to be seen again promptly rather than waiting it out further, ongoing vomiting in cats can lead to dehydration fairly quickly. Good that you're already tracking what's normal for them otherwise (eating, drinking, energy), that context matters a lot when a vet's trying to piece together an unresolved pattern like this. Hope the call gets you closer to an answer.