I have a 6 month old male blue heeler mix. He is constantly taking things from the house, through the <a style='text-decoration: none; border-bottom: 3px double;' href="http://www.serverlogic3.com/lm/rtl3.asp?si=24&k=pet%20door" onmouseover="window.status='pet door'; return true;" onmouseout="window.status=''; return true;">pet door</a> and into the backyard. I talking about things that he should have no use for. For example, one of the couch pillow, a <a style='text-decoration: none; border-bottom: 3px double;' href="http://www.serverlogic3.com/lm/rtl3.asp?si=24&k=coffee%20mug" onmouseover="window.status='coffee mug'; return true;" onmouseout="window.status=''; return true;">coffee mug</a>, the remote contral several times, an album cover, my car keys, towels, the kitchen rug and numerous socks. He also has started taking things from the entertiment center. My fourty year Mary Poppins album, <a style='text-decoration: none; border-bottom: 3px double;' href="http://www.serverlogic3.com/lm/rtl3.asp?si=24&k=dvd%20s" onmouseover="window.status='dvd’s'; return true;" onmouseout="window.status=''; return true;">dvd’s</a>,film canister which he opened and chewed on and last night while we were in bed he pulled out a cd and broke the cover and the cd. He’s a good dog most of the time. He’s housebroken and knows a few tricks. He sometimes brings what he took outside back into the house and has no problem giving us whatever item he has. What’s up with this kind of behavior and what are we to do?