Neutering male dogs is commonly believed to make them more submissive and calmer, but studies show conflicting results. While some dogs do become calmer after neutering, others may exhibit increased aggression. Neutering doesn't necessarily chill out a dog or reduce their energy level, and some may even become more aggressive post-neutering. The misconception that neutering always leads to a dog being more obedient and docile is challenged by the reality that for some dogs, the opposite - increased aggression - can occur after the procedure, which may puzzle dog owners.