I start all my pups on a harness for this reason... Somehow the harness seems to bother them less than a collar. My newest pup, 3.5 month old Cattle Dog was no exception to the dislike of the collar when we first got him. He's been happily wearing a harness for some time now and when we went to the vet yesterday, I clipped a collar on and he acted like nothing out of the ordinary happened. No reaction at all. When I am getting a pup used to a leash dragging and they aren't wanting to walk, I usually pull a favorite toy along the ground to get them moving. One of my dogs I actually attached the toy to a stick and rope so I could hold it out in front of her while we walked. Donkeys and carrots take many forms...