At what age should I have my boy neutered? He is three months old today and I want to make sure to be prepared early. He is starting to "hump" (for lack of a nicer word) his stuffed animals and our feet. Is this just something he will do anyway? He is small- one pound 12 ounces last week when I weighed him. I am worried about anesthesia. Thanks for all the information you all have provided me already. It has made being a new mommy less scary since he is my first puppy. Thanks again!