Well let me be the contrarian on this issue. First let me point out that the owner of dog food store, though its ok to offer suggestions if asked and/or state one's opinion, that is no excuse for him being an arrogant ***. But as to his opinion on neutering, there is validity to it. For 40 years or more we have heard the repeated mantra from some Vets to various organizations that neutering is the proper action to take if one is to be a responsible dog owner. I disagree for a variety of reasons. This entire ideology on neutering began because of overpopulation of dogs and because so many were unwanted and wound up in shelters and euthanized, neutering [castration] was viewed as the more humane approach but as to the claims of it being healthier and that it can solve an endless variety of behavior issues I think is unwarranted. Other than having unwanted litters and perhaps some particular behavior issues such as intractable aggression that cannot otherwise be controlled then perhaps neutering is unnecessary. I don't think that neutering should be considered as a given and as some sort of rite of passage that dogs must go through. Many of the so other so called benefits associated with neutering are exaggerated to say the least and seems to me most likely misleading. Below are a few other differing opinions on this issue. I know this can be a loaded and emotional issue but there are two sides to it.
Scroll down to June 26 post from Ted Kerasote
Also Ted Kerasote in an interview discusses why European dogs live longer than dogs in the states and one of the reasons is related to neutering. Link below
Other links related to this issue.
Truly great articles!!