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My new kitten isn't dewormed. Is my older cat at risk of worms?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | unspayed | 2 months and 3 days old | 2 lbs

I have an 8 month old female cat fully vetted. Just took in a 9 week old cat never vetted. I can't get her dewormed till I get a fecal sample,,,can't get one!!! Is other cat in danger

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Answered By Emily, DVM

Veterinarian

Published on June 7th, 2017

Generally speaking adult cats tend to be less sensitive to G.I. parasites and kittens. Also for many G.I. parasites they have to be passed in the feces and then spend a certain amount of time maturing before they become re-infective. So if you do a good job of cleaning the litter box frequently there's a lower risk of infection to your adult cat. If your adult cat is on a monthly heartworm preventative many of them also include a deworming medication. There are over-the-counter deworming medications you could consider giving to both cats however it's not guaranteed to clear all possible G.I. parasites. you could also discuss with your veterinarian about your inability to get a fecal sample and if they would be willing to just give a broad-spectrum deworming medication to your kitten.

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