Petco Text Logo
Petco Pet Logo

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?

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

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.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored