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My dog had a seizure, now has blood in his urine. What's wrong?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 11 lbs

My dog is prone to seizures and according to last vet visit might have hydrocephalus. He had a seizure today (this is almost monthly he has one) and we noticed afterwards he had ALOT of blood in his urine. He does not seem to be in any pain. We know this is not normal, but we are in Texas in Harvey's wrath and cant get to a vet until probably Monday-Tuesday. What might be causing this and is there anything we can be doing to help?

1 Answer

Most Helpful Answer

Dr Stafford, BVetMed, MRCVS

Answered By Dr Stafford, BVetMed, MRCVS

Veterinarian

Published on August 26th, 2017

Red coloured urine can be caused by blood like you say or by a pigment called myoglobin entering the urine. Myoglobin is not normally found in urine but when there is massive muscle damage it can be. Seizure activity stresses the muscles so I suspect what you are witnessing is actually myoglobin in the urine from muscle breakdown. It is posdible he has a bad infection in the urinary tract or has damaged it causing bleeding. If he is coming out of the seizures ok and seems well enough otherwise you may be able to wait until Monday. But if they get bad and he isnt coming out of it/ having one after another you will need to find an emergency vet. Best of luck.
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