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Why is my dog's bath water bloody after a flea bath? Is he okay?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered

I went to give my yard dog a flea bath today, put him in the shower with me, and the water ran crimson with his blood. I let the water run for about a minute to make sure it wasn't just a buildup of dirt, but it never diluted. He's woefully infested with fleas, and I don't know where the blood is coming from. He doesn't have any obvious open wounds.

1 Answer

Most Helpful Answer

Dr. Strydom, DVM

Answered By Dr. Strydom, DVM

Veterinarian

Published on October 13th, 2019

The blood is probably from the dead fleas. I would not be overly worried about it. You just really need to get him on a high quality prescription flea medication. There is really no excuse for a flea infestation when there are so many good products on the market. Poor guy must be miserable......

I suggest an oral pill like Bravecto, Nexgard, Comfortis or Simparica. You can try one of these local vaccine clinics to get a product.

( https://www.vippetcare.com/find-a-clinic/32534/ )

( https://www.ezpetclinic.com/products )

( https://www.shotvet.com/pages/walgreens-pet-vaccine/ )

If you don't want to do that then you can try using K9 Advantix II from your local Petco or Walmart.

( https://www.petco.com/shop/en/petcostore/product/k9-advantix-ii-topical-large-dog-flea-and-tick-treatment )
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