Gunner is getting neutered Friday I think but is it okay if he plays with the female puppies in his puppyclass Monday before? He is about 4 1/2 months old. It is okay or should we hold back because the two dogs closest to his size that we play with are both females. Last week some people were asking if the dogs had been spayed or neutered yet so I don't know if they should be playing together or not and I've seen some really young mommy dogs on petfinder. At what age can dogs mate?