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Why does my cat still have flea dirt after using flea drops?

Updated On September 23rd, 2025

Pet's info: Cat | British Shorthair | Female | spayed | 18 years and 7 months old | 5 lbs

Hello. Thanks for your reply. D'd sat on my bedding today. She still has flea dirt. Was that okay? I only changed it on monday.Yesterday mum used grooming wipes and a flea comb. Today I have used a flea comb and dowsed it in water after every few combs,and used a damp piece of tissue. The dirt turned red/brown. She could only tolerate so much before her tail started wagging. I put Bob Martin flea drops on her on Monday but they haven't helped much. There's still quite a bit of flea dirt on her.

2 Answers

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Answered By Susan England-Foster

Veterinarian

Published on August 9th, 2017

I find the flea dirt takes a bit to go away completely. If you are treating the environment and the pet than you are doing the right things. It can take a few months for the life cycle of the flea to end. Keep up the good work and you will start to see progress soon

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    Answered By Jenny, DVM

    Veterinarian

    Published on September 14th, 2017

    Flea powders do not work well for environmental control. That is best treated with the foggers but you have to get everyone and the animals out for a few hours. The itching can last for 3-4 weeks from previous flea bites so if it is bad he may need medicine from your vet to keep him comfortable while things gets under control. Flea topicals only work when a flea gets on the cat... so anything in the environment that still gets on him will ingest the medicine and then die, so this is why you are still seeing flea dirt. If you keep with regular flea control for 3-4 months, you can get ahead of the life cycle and the problem will be taken care of

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