I just purchased a 5 month old Shar Pei about 3 days ago. He's warmed up a little bit but he still growls at me when I come in the door sometimes and he always growls and barks at other people that come over. Everything I've read says not to tolerate growling but I'm at a loss of how to take care of this problem. I've just been putting him outside or in his cage and letting him know this is wrong. I've never hit him. Is this normal? I want to have a dog that will be friendly to everyone. Can anyone help? Thanks a lot.