I have a 2yr old castrated male, his name is Dunkin. He is a BIG boy, weighing over 125lbs. He is a love, I started puppie school when he was young and loved it! He is a very social dog, with humans(loves children)and other animals.He is very outgoing, always happy, never head shy.He is very smart and knows how to get what he wants, but on the other hand he knows I'm the boss! My house is constantly filled with family and friends, he (dunkin) loved them all! The problem i've been dealing with is when my company gets up, puts on thier jackets and gets ready to leave, Dunkin will start to grunt, turning into a growl and once my company starts heading to the door, he starts to bark at them and goes right up to them barking, grabing on to the sleeve of the jacket and gets into a 'game' of tug-of-war. I have to pull him off, and will hold him until my friends leave(as he is going nuts barking, if i'm sitting on the couch holding on to his collar, he will drag me and the couch closer to the door, like he wants to go grab them)once the door closes, i let him go. He will go to sniff and grunt at the door, bark, them return to what ever he was doing before. He only does this to certain group ofpeople, people he knows really well too. He see's them almost every day. ( when these people come into the house he is soooo happy to see them) He is crate trained, but if he is in the crate, he will go nuts, he goes crazy. That's why I would rather hold on to him, rather than put him in his cage. How can I stop this behavior issue? It's like he doesn't want them to leave, why? My friend told me that he heard about this, it's a thing that rotties do, they prevent people from leaving his house. Any sugestions would be helpfull. Has anyone ever heard of Rotties doing this?