Hi everyone! My main boy Clyde a 4 year old English mastiff has had a little round black bump on his testicles for a little bit now taken him to a couple vets to get opinion of what it could be. Basically they thought it could be a cyst but unknown to be cancer without a biopsy, today I realized it had ruptured. There’s no bleeding it seems to not be bothering him at all. I’ll put a photo in hopes of someone possibly having been through the same thing. I am making a bet apt but thought I should post here. Thank you.