I have this blue heeler I had him for 4 or more months now, This problem started when he was a puppy,when I first got him, when ever I tried to play with him he would start bitting not a nibble a bite or he would pull on your clothes trying to rip them. The bites are starting to get worst and so is the pulling on clothes he is starting to tear holes into clothes and making scars or scratches when he bites. Also he has been chewing on stuff and my mom said if he keeps chewing on stuff we have to give him away. I put him in the cage when he chews stuff, but when my moms boyfriend sees my dog chewing or doing something wrong he hits him and puts him in the cage. I have gotten many warnings from my parents saying if he chews anything up he is gone. Please reply as soon possible , I really don't want to loose him.