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Kitten sick after vaccination: vomiting, straining, soft poop. Normal?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 3 months and 19 days old | 2.8 lbs

My kitten recently got vaccinated (yesterday) and her stomach is not reacting well. Today she strained to poop, poop was normal brown colour and on the soft side, but not concerning. She meowed a bit while she pooped then threw up afterwards. She went completely back to normal kitten behaviour, running around. Should I be concerned?

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on June 21st, 2019

As long as she is behaving normally now, there is likely no cause for concern. She may have had a mild vaccine reaction. If she is due for more vaccines, mention this episode to your veterinarian before the next round. Monitor for continued symptoms and see your vet if they persist or worsen.

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