My 9 month old australian sheopard who I have raised since he was born has devoloped a wierd behavior and he is getting afraid of people. When he was little he loved everybody but when people come to the house now he becomes protective and growls and thenif he likes them he is friendly but some people he does'nt like for some reason he is afraid and I am afraid he might even bite if this gets worse. My own family he does'nt know he is like this to. he has'nt been beat by anyone I know this for sure. I don't know what to do.