What problems can my intact male dog face if I don't neuter him?
Updated On September 23rd, 2025
Pet's info: Dog | Labrador Retriever | Male | unneutered | 1 year and 4 months old | 70 lbs
It is recommended that my Labrador Retriever stays intact until at least 2-4 years old. What problems if any could he face? My last Lab had no problems through entire life being intact. My concern is that it appears that removing testicles causes dogs to have tumors, etc. I guess I'm not really convinced that being born with testicles, something natural during reproduction will cause problems for most dogs.
5 Answers
Most Helpful Answer
Published on February 21st, 2017
The main reasons that most dog owners opt to neuter male dogs are behavioral - urine marking, roaming in search of females, and not getting along with other male dogs are all common problems for many intact males. In terms of possible medical issues, as they get older they often develop issues with prostate enlargement, prostatic cysts, or infections. Testicular tumors can also be an issue. And of course, you have the lifelong responsibility of making sure that your dog does not contribute to the pet overpopulation problem by fathering any accidental puppies. If you don't mind the behavioral issues and are prepared to keep your dog safely confined to prevent roaming, then you don't necessarily need to neuter unless medical problems develop. It's definitely a personal choice, not a one-size-fits-all recommendation :)
1Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on February 20th, 2017
I really don't know of any behavioral issues that are linked to an un-neutered male, but there are some medical reasons for neutering. Neutering is recommended to deter marking behavior, pets escaping and running off due to the presence of a female (currently one of the top reasons for hit by car accidents involving intact males), it decreases the chances of prostate issues, and certain cancers are linked to intact males (perianal adenomas). On the other hand, Labrador Retrievers are among one of the few large breed dogs where it is recommended to neuter them much later in life, usually around 2-4 years of age. This is because new evidence suggests that neutering earlier can increase the chances of certain bone cancers and bone problems later on. I hope this helps!
2Pet Parents found this answer helpful
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Published on July 6th, 2019
I highly recommend neutering all dogs at 6 months of age. Pros: less behavioral problems, no testicular cancer, decreased risk if any risk of prostatic diseases. Cons: You have to watch what they eat because their metabolism doesn't have the hormones that typically speed it up. It is healthier for your dog to neuter him. Thank you for using Petco Pet Education Center, formerly Petcoach.
1Pet Parents found this answer helpful
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Published on February 22nd, 2017
The main advantages for castrating male dogs are behavioral - intact males have a tendency to urine mark (sometimes in the house!), often don't get along with other male dogs, and are highly motivated to roam in search of females. These can be problematic behaviors for many family pets. From a medical standpoint, intact males are prone to get prostate enlargement, prostatic cysts or infections, and sometimes testicular tumors as they get older. There is some limited evidence that early neutering may increase the risk of certain cancers and orthopedic issues in some breeds, but these effects can usually be mitigated by waiting until the dog is fully grown to neuter. For me personally, I usually neuter my male dogs at around 12 months of age, when they are finished growing. This is also what I recommend for most clients, unless there are specific reasons for leaving the dog intact (show or working dog, breeding dogs, etc.)
1Pet Parents found this answer helpful
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Published on February 16th, 2017
Yes, a part from male/sexual related behaviour and prostatic hyperplasia there are not specific indications in my opinion. A lot of vets suggest that to facilitate training and avoid unwanted behaviour like aggressions. Do not feel obliged to castrate him, it is not strictly necessary.
2Pet Parents found this answer helpful
What are the negatives of an uneutered male dog ?? Thanks for your help
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