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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.

2 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

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 :)

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    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!

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