My pup, who is six months old, used to do the same thing to me, but not my husband. I immediately recognized it was because he viewed me as an equal, and this was my own fault because I wasn't consistent with him. At first I would play wrestle with him, because I did this with my lab when she was a puppy. However, I learned quite fast that ridgebacks don't have the soft mouths that labs do (and had many bruises to prove it!!). After this, I never played rough with him and every time he tried to nip me, I would calmly make him sit. Sometimes that didn't work, because he was so wild, if that was the case I would give him a scruff shake -- just grab the scruff of his neck, say in a sharp tone 'enough.' That was always effective. He no longer does this to me at all.
