Some doggie parents may not be aware, that doggies that are not neutered, are prone to prostate issues, like around 80%. I already knew this. Many years ago, when my brother was away, was taking care of his dog, beautiful Huskey, and he was not acting right, called my brother and told him I was taking him in. He had the beginning of prostate issues, the vet recommended he be neutered. Called my brother back, told him, why he needed to be neutered and what the vet said about prostate in an un neutered dog. My brother didn't know this and OK'd it, because he knows, how I am about animal health/care, and that I know what I am talking about, and he trusted me. The dog lived a very long life.
The benefits of neutering a dog.
http://www.peteducation.com/article.cfm?c=2+2112&aid=911Just as with kitties, doggies too are prone to mammary issues, that are not spayed.
The benefits of spaying a dog.
http://www.peteducation.com/article.cfm?c=2+2112&aid=926