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Why is my dog still bleeding from his bottom after vet treatment?

Updated on September 23rd, 2025

Pet's info: Dog | American Bulldog | Male | unneutered | 12 years old | 120 lbs

I have a 12 yr old male American bulldog. He has been having a blood like discharge from his bottom for several wks. I’ve had his anal sacs expressed and there’s still a discharge. Vet has him on 1300mg of di-trim 2 times a day. He’s been taking it for five days. Only seeing a little improvement. He weighs 120 lbs. What could the problem be?

1 Answer

Most Helpful Answer

Amy S. Eutsey, DVM

Answered By Amy S. Eutsey, DVM

Veterinarian

Published on February 25th, 2020

Hello. Dark blood like this at the anus may indicate a polyp or tumor in the rectum or anal area. It can sometimes be difficult to feel this with a finger during a recital exam. but if it is close enough to the anal opening, it might be accessible. Aside from a bleeding mass, other causes can be chronic colitis or anal sacs infections. Your vet may need to sedate him to do a more thorough rectal digital exam, or consider using a scope to look up in there to see if there is anything. Best of luck. Thank you for using Petco Pet Education Center, formerly Petcoach.
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