We have a 14 week old corgi who will not tolerate a collar, much less a leash. I have never encountered this before in a dog or puppy and it is becoming quite a problem. When the collar is on, he shakes, scratches at it, and goes into "I will not be happy now" mode. If I attach the leash, he completely shuts down and will not move. If I walk, I drag him along on his back. I've tried treats and talking in a ridiculous "baby talk" voice but it does not work. I've tried leaving the collar on for short bits of time and just leaving it on all day. It is affecting his house training because when I take him out to potty without a leash, he simply runs around wildly playing with the cats and our other dog. In fact, he is becoming very focused on our other animals and paying less and less attention to us. I've massaged him all around his neck and find no evidence of pain or any physical problem, so I'm assuming this is quite a stubborn streak he has. Any suggestions?