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My neutered dog has blood on his penis. Is it due to a female in heat?

Updated On September 23rd, 2025

Pet's info: Dog | Dachshund | Male | neutered | 3 years and 6 months old | 9.3 lbs

2.5 year old neutered dachshund mix had blood at the end of his penile sheath last night. No apparent symptoms today, but I haven't witnessed him urinate today. We do have a female in heat in the household, as well.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on November 20th, 2016

There could be a couple of things going on with Mickey. Neutered dogs can still try to mate, so if you have a female in heat in the house, he may have had sex with her and got blood on his penis from that. It could also be caused by a bladder issues, such as a UTI or bladder stones. If the blood is the only sign, and he is showing no other symptoms (such as frequent urination in small amounts), then I would be more inclined to think the blood is from trying to have sex with your female. I would monitor him for now, and if he does show any other signs, such as frequent urination in small amounts, I would take him into the vet for an exam. You can also keep him separate from the female until she is out of heat, and if no more blood appears on his penis during that time, then it is likely due to him having sex with her.

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