My doodle Ovie is 15 weeks old. All he does is bite on my husband and I. We always have a toy on hand to give it to him so he'll bite that. I find it hard to give him some loven because he will just bite. Please tell me this is definitely a puppy thing and he'll out grow it. We had him in puppy training for a couple weeks. It was a one on one session. He was pretty good at first, but started again. At what age do they outgrow this?