I have a two year old mixed breed male from a shelter. We beleive it's lab, beagle and possibly springer or border collie. It is a well mannered dog but is very aggressive towards people that come to the door. He barks and runs towards the door but once we say it is ok then he is great with the person. My concern is when someone comes to the door when I am not readily available. I've tried the distraction thing with food and getting him to sit when someone comes to the door but as soon as the food is eaten he is back to running towards the door. He is fine in public when he is with me. Any suggestions?
Paul: