I'm going to give leash-training another try with Murray. The first time around, I acted pretty hastily and didn't give him much of a chance to get used to the harness/leash before trying to walk him. So he resisted. This time, I found some pointers online that stress using lots of patience and going very slowly. Today I put the leash/harness on him for a brief while, gave him some treats and talked to him nice, praising him for being a good boy, and then after removing the harness/leash played with it like a toy with him, dangling it for him to grab at (on the theory that if he comes to "like" the leash/harness, maybe he'll be better about letting me put it on him). As I write this, he's playing with the leash/harness all by himself. So I'm encouraged.