Petco Text Logo
Petco Pet Logo

  • Two Easy Ways to Start Earning Rewards!

Why is my unneutered dog losing weight and bleeding from his penis?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | unneutered | 57 lbs

My dog has lost 15 lbs in the last 6 or so weeks and now his penis is bleeding, why

1 Answer

Most Helpful Answer

Image profile

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on January 7th, 2018

I see that Semper Fido isn't neutered. In dogs who aren't neutered, prostate problems are a very likely cause of bleeding from the penis. These problems include benign prostatic hyperplasia, prostatitis, and prostate cancer. These could also cause weight loss, especially cancer. The bleeding could also be caused by a UTI or bladder stones. I would take him into your vet first thing tomorrow for an exam. Your vet can do a rectal exam to see if his prostate is enlarged, and can do x-rays, routine blood tests, and a urinalysis to see if he has a UTI or bladder stones. If he does have a problem with his prostate, neutering him is one of the recommended treatments. Good luck, I hope this helps!

Vote icon

1Pet Parents found this answer helpful

Related Questions

Petco Pet Education Center
Health & Wellbeing
My dog is dripping blood from his penis area, he does not seem to be feeling ill, and he is not licking it. He did have some loose stools this week.
I see that your dog is not neutered - I'm not sure how old he is, but in middle-aged or older unneutered males it is common to see blood dripping from the penis as a symptom of an [enlarged prostate](https://www.petcoach.co/dog/condition/prostate-enlargement/). That is normally the first thing that I would check out in a dog with this problem. Other possible causes include an injury or tumor on the penis or the penile sheath, a bladder or prostate infection, bladder stones, kidney disease, or even a systemic bleeding disorder. I would recommend taking him to a vet for an exam - they will probably want to collect a urine sample for testing, check his prostate during a rectal exam, and examine his penis closely outside the sheath to look for any problems. From there, x-rays and ultrasound can be used to look at the prostate, if needed. If the problem is due to prostatic enlargement, this can normally be improved with [neutering](https://www.petcoach.co/article/benefits-of-neutering-castr
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
My 9 year old chiwawa is dripping light color blood from his penuis, and milky stuff. His urine stinks with a different oder What could it be and what treatment is available.
I see that Pappy Fox isn't neutered. In dogs who aren't neutered, prostate problems are a very likely cause of bleeding from the penis. These problems include benign prostatic hyperplasia, prostatitis, and prostate cancer. The bleeding could also be caused by a UTI or bladder stones. I would take him into your vet today for an exam. Your vet can do a rectal exam to see if his prostate is enlarged, and can do x-rays, routine blood tests, and a urinalysis to see if he has a UTI or bladder stones. If he does have a problem with his prostate, neutering him is one of the recommended treatments. Best of luck.
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
a week or so ago i noticed some lumps that come and go along the sides of a stray dogs penis. now he is bleeding from his penis and is obviously in pain. what can this be ?
These lumps along side his penis are likely the bulbourethral glands, which are a normal part of a dog's anatomy. They will appear when the dog is aroused. Bleeding from the penis is not normal, however, and Blacky has to see a vet right away, especially if he is in pain. In dogs who aren't neutered, prostate problems are a very likely cause of bleeding from the penis. These problems include benign prostatic hyperplasia, prostatitis, and prostate cancer. The bleeding could also be caused by a UTI or bladder stones. I would take him into a vet now for an exam. The vet can do a rectal exam to see if his prostate is enlarged, and can do x-rays, routine blood tests, and a urinalysis to see if he has a UTI or bladder stones. If he does have a problem with his prostate, neutering him is one of the recommended treatments. If you don't want to assume financial responsibility for Blacky, then I would call the ASPCA to come and get him. They can give him the medical attention that he d
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
My granddog bleeds from his penis every time he comes to visit. He is not been neutered. Is it because we have a female dog ( neutered) living here? He has gone through testing and is healthy . Vet recommended he be neutered. Just wonder why it is on
You dog is probably suffering from a prostate disease (cancer or inflammation), it's very common in unneutered dogs. i recommend taking him to the vet ASAP, if it is not an advanced cancer then neutering him will solve the problem.
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
What would make my dog rocky pee blood?
I see that Rocky isn't neutered. In dogs who aren't neutered, prostate problems are a very likely cause of bleeding from the penis. These problems include benign prostatic hyperplasia, prostatitis, and prostate cancer. The bleeding could also be caused by leptospirosis, bladder tumors, trauma, a UTI, or bladder stones. I would take him into your vet today for an exam. Your vet can do a rectal exam to see if his prostate is enlarged, and can do x-rays, routine blood tests, and a urinalysis to see if he has a UTI or bladder stones. If he does have a problem with his prostate, neutering him is one of the recommended treatments.
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
My dog is bleeding after urinating he is not neutered, 8 yrs old, not excessive licking in the area, it is thick and clotty, its not constant only after toileting, solids are coming out as normal,
Because he is not neutered it is very likely to be due to a prostate disease (infection or cancer), i would recommend taking him to your vet ASAP in order to get it checked, he will probably need to be neutered the soonest possible.
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
My dog is 13, he’s a uneutered male. He’s always been a thin dog, but he’s look extremely skinny now and is having a bloody discharge from his penis now. I took him to the vet a few weeks ago thinking it was his anal glands. Any help Is appreciated
He needs a urine sample performed to check for an infection, crystals or cancer cells. An ultrasound can look inside the bladder to check the wall thickness and look for a mass and check his prostate . At his age any of these are possibilities and there is no way to know without testing
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
My Labrador Retriever is bleeding watery blood from his peanus last month, today and yesterday but is still in good humor. What could it be? He is not neutered and is around 2 and a half years old.
These signs might be compatible with a urinary tract infection/inflammation. Stress related (idiopathic type of inflammation) infection and presence of crystals are the most common causes of it. A clinical examination at your local veterinarian is essential to confirm these clinical suspicions and treat appropriately. Antibiotics may be needed. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
My dog he is bleeding from his pee hole and is vomiting.
Poor Sheru! I'm wondering if he's neutered or not. In dogs who aren't neutered, prostate problems are a very likely cause of bleeding from the penis. These problems include benign prostatic hyperplasia, prostatitis, and prostate cancer. The bleeding could also be caused by leptospirosis, bladder tumors, trauma, a UTI, or bladder stones. I would take him into your vet today for an exam especially since he is also vomiting. Your vet can do a rectal exam to see if his prostate is enlarged, and can do x-rays, routine blood tests, and a urinalysis to see if he has a UTI or bladder stones. If he does have a problem with his prostate, neutering him is one of the recommended treatments. Best of luck.
Updated on September 24th, 2025
Petco Pet Education Center
Health & Wellbeing
Hello doc My dog had a swollen hind leg wich has improved very much after a week. We have been taking him to vet. But since the time hez leg is swollen there has been light REDDISH penile discharge.It's not always. Only seen just 1 or 2 drops only in
This penis discharge isn't as rare as you would think. I see that Scooby isn't neutered. In dogs who aren't neutered, prostate problems are a very likely cause of bleeding from the penis. These problems include benign prostatic hyperplasia, prostatitis, and prostate cancer. The bleeding could also be caused by a UTI or bladder stones. I would take him into your vet today for an exam. Your vet can do a rectal exam to see if his prostate is enlarged, and can do x-rays, routine blood tests, and a urinalysis to see if he has a UTI or bladder stones. If he does have a problem with his prostate, neutering him is one of the recommended treatments. I hope this helps!
Updated on September 24th, 2025

Related Searches

Dog Supplies Dog Food Dog Health & Wellness Dog Incontinence & Bladder Control Medicine Dog Blood Pressure Medication Dog Medicine and Prescriptions UTI & Kidney Supplements for Dogs Dog Thyroid Medication & Hormone Care Diuretics for Dogs Dog Vitamins & Supplements Proin ER Dog Incontinence & Bladder Control Medicine Proin Dog Incontinence & Bladder Control Medicine Incurin Dog Incontinence & Bladder Control Medicine Ursodiol Tablets Dog Incontinence & Bladder Control Medicine CitraVet Dog Incontinence & Bladder Control Medicine Proin UTI & Kidney Supplements for Dogs Potassium Citrate Dog Incontinence & Bladder Control Medicine Vetmedin Dog Blood Pressure Medication Epogen Dog Blood Pressure Medication VetriScience UTI & Kidney Supplements for Dogs
image
Have A Vet Question?

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

Book Now

Sponsored