I have a 2 year old neutered yorkie... We had a new baby girl in November. He has always been SO great at not going potty in the house. When he started marking we decided to get him neutered... We never had a problem after that! Until now! Ever since the new baby came home he pees in the house CONSTANTLY! We let him outside and he will come in a pee, even when he has been outside for 30+ mins! He is also super aggressive. He tries to bite my husband and older daughter! I'm worried about him biting the baby, he has been awesome with her so far. But i'm worried once she is mobile that will change. My main concern right now is the peeing everywhere.. He is a totally different dog since we brought the baby home!

Advice please!!