joe503

Hi, I adopted a 5-yr-old bullmastiff / pitbull mix 6 months ago and similar story. He's totally sweet with people of all kinds from babies to adults - and had been living and getting along well with my roommate's sheperd / collie mix. But 3 months in he just started going nuts around other dogs to the point i can't bring him around other dogs anymore. I've heard - and have no idea if this is true - that the pitbull (and possibly the bullmasstiff) brain can outgrow the dog's skull or something, and at a certain age the pressure can distort their perception and behavior - hence making them a bit nuts. I do hope this is not the case and also am wondering if anyone can offer help as to how to properly socialize this dog - or whether it's just not possible and related more to genetics than training. best, Joe