Ash, I know you want the best for chewy. So I say this as to try to help him. Have you thought about giving him to the miltary or police for and working dog? They need dogs that have an independant streak and can be thinking of there self protection. Its a jobyou could be proud of him doing and you know they take very good care of them.Now is the time they are really training for homeland protection and such. Or how about you local police dept. do they have a k-9 unit ? I have had them help me with an aggeresive dog be fore . They have great techniques and want to help be for they get a call about bites or maulings. Give it a try for Chewys sake.