My dog is about 8 months old, he's a Doberman Rottie Lab mix. He's fairly well mannered and his only problems at this point are barking at strangers or racoons(that was kinda my fault for screaming and nearly running up the side of the house when I saw one) and sitting on me and growling. Since that 'sitting on me and growling' thing sounds bad and easily misunderstood so I'll elaborate to avoid warrented confusion. I'm the youngest member of the family at 14, my papa works graveyard shift and my sister is in collage and my mother isn't with us anymore so I'm at home alone all night. When we got Flinx he was only about 5 pounds and 6 weeks old. He grew...and grew and I think he probebly is still doing so...I already have elbowed him in the head by accident while standing(I'm short though )....anyway(sorry for getting sidetracted...)since he was about 5 months he's been horrible when my dad leaves for work, my other dog is usually asleep by then and just chills on her doggie bed or next to me on the floor(I sit on the floor most of the time...yes I know I'm weird) but flinx walks all around the room sniffing then lays down near me and kinda goes to sleep, but the second he hears a noise he either gowls and barks or sits on me(which hurts cause he weighs so much...) and growls off into the distance. I can get him off of me but its a battle and when I'm shoving I say off and when he FINALLY does I say good boy but then at the next sound he does it again! He never does it when my dad or sister is home, and my other dog never does anything like it at all. Sorry that took so long to explain, I'm not very good at this way of asking questions So any advice and insight as to why he does this and how to make it stop? my legs are getting sore from his hinnie!