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My cat got flea spot-on, but I still see fleas. Is it working?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 1 year and 2 months old

I have applied Fypryst Combo spot on on my cat yesterday, on 24th, however, I still combed a flea when I was combing her tonight, will the fleas that jump on her die? Can they reproduce? Will the eggs be able to hatch?

1 Answer

Most Helpful Answer

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Answered By Kevin Sanada, DVM

Veterinarian

Published on July 25th, 2019

This medication should kill all the fleas within two days of use. If it's not, then I would check to make sure you gave the right dose, gave it properly and did not give a bath soon after applying ( should not bathe for at-least a week after applying). If the flea you combed-out was dead, then all is good. If not, then wait a day, or two and see if there are any live ones. The medication will kill any flea that jumps on her for the next month. However, there is a concern with the fleas reproducing in the environment. Treating for fleas is not just restricted to the host, because fleas do reproduce and nest in the environment and continually cause an issue. Below is a link to a short article that explains treating the cats and environment for fleas: https://www.petcoach.co/article/5-tips-to-get-rid-of-fleas/ I hope that helps and all is well with Missy.

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