Why is my dog's penis bleeding during semen collection? Is it TVT?
I would have your dog examined by a vet for confirmation that he has TVT. There typically is mass seen on the penis with TVT, and a vet can examine the area for the tumor, and take a biopsy of the mass to confirm he does have TVT. If he does have TVT, some of these tumors spontaneously regress without treatment, but some do have to be removed surgically if the tumor is found to be malignant. With medical treatment, there is an overall good prognosis, so I would recommend having him seen by a vet first to confirm TVT before getting worried. In order for it to be positively confirmed, a biopsy needs to be done, as it's not something that should be diagnosed based solely on blood dripping from the penis. There are other causes of blood dripping from the penis, such as prostate disease, bladder problems, and vigorous semen collection. These should be ruled out as well. The breeder, while they may be well-meaning, would have not have the veterinary training to make a definitive diagnosis of TVT, and you should therefore see your vet for an exam and biopsy before you start to worry :-)
Updated on September 23rd, 2025