My dad owns an Aussie Healer-Collie (or supposivly thats what the dealer told us but were not really sure what mix it is) and liek most Aussies that are bought from uneducated dog owners, he was a mad man. Mad Max actually as Max is his name. Now the problem with him is really with me. Hes about 2 or 3 years old and for the last like 3 months he has suddenly started to like...hate me. He's very attached to my dad, and he likes my brother and grandfather, and he used to be extremely happy when I would come home. (Divorced parents, not always at my dads). I woudl come home and he would lick me and want me to pet him and get all excited. But now he gets real defensive and growls at me, gets all tense. Somtimes he runs to his food, or his bone and guarding it. I have in no way abused him in any shape or form he just all of a sudden decided he doesn't like me. I've tried alot to get him to trust me again but I can't seem to do it. Any one have any suggestions?