I agree with everyone about neutering your male dog. It is important for all the reasons already mentioned. Good advise.

I had both of my dogs neutered, but I have not seen any change in their weight, energy, or aggressiveness. Since I have Golden Retrievers, they don't usually display these problems. The only significant thing that decreased and then disappeared altogether, was their tendency to "ride" other dogs, the cat or small kids. That habit is gone completely.

A question I wonder about with neutering males, along the same line, but more sensitive...and maybe you guys don't want to read this...but, the question is, after neutering will a male dog decrease or lose the tendency to have frequent, and I don't know how to say this, "winkie peeking out"? Not trying to be a sickie, just that sometimes others ask why one of my dogs (12 mos old) still does this. It does not follow any pattern in the occurance. My other dog has never done this. Is this connected with neutering also?