Why are my foster kittens dying suddenly with seizures and vomiting?
I’m so sorry for your losses. The only way to determine what the babies have died from would be to have a necropsy or postmortem exam done. I understand with foster pets this might not be financially feasible, but it may give answers and potentially help the remaining kittens. If all from the same litter they could have a congenital Disorder causing the seizures and death, or they may have been exposed to a virus while in utero or shortly after birth. Some toxins, exposure to flea control products, or medications can cause seizure and death.
Diagnostic testing can be difficult with kittens this little but it may be worth discussing running a Health screen or viral panel on the remaining kittens to assess their health.
Otherwise, the best thing to do is make sure they are on a good plane of nutrition, use only Anti-parasite products recommended by your veterinarian, and vaccinate as they get old enough.
Thank you for taking care of these kittens, best of luck with the rest of the litter. Thank you for using Petco Pet Education Center, formerly Petcoach.
Updated on September 23rd, 2025