Neutering a male dog prevents testicular cancer and reduces the risk of other problems, such as prostate disease. A neutered male dog might also have less desire to roam. May help with certain behavior issues. ... Neutering may also decrease aggressive behavior in some dogs.

What happens if you don't neuter your male dog?

From a health perspective, male dogs that aren't neutered can develop serious infections of the prostate, as well as testicular cancer and tumors, which can require invasive and expensive surgery. Unspayed female dogs can also cause a whole other set of problems — one big one being that they can get pregnant.

What is the best age to neuter a male dog?

The recommended age to neuter a male dog is between six and nine months. However, some pet owners have this procedure done at four months. Smaller dogs reach puberty sooner and can often have the procedure done sooner. Larger breeds may need to wait longer in order to properly develop before being neutered.