The alpha roll is very dangerous to use actually when trying to show your dominance. It could easily end in a bite to the person trying to use it on the dog.
I highly suggest you consult a trained behavorist who can walk you through step by step how to deal with aggression (if this is what is happening).
Everyone on this site I'm sure wants to help you, but really in cases of aggression you need a trained proffesional. |