Well, I'm not Carrie, but I would advise putting the leash on and letting Perry wander around with it on for a while. Keep an eye on him so he doesn't get hung up on anything or eat it and then reward him when he's good. You might also teach him to sit to be leashed. When he gets wild, just stand up and ignore the behavior and then have him sit again. Eventually, he'll get the idea that he's going to get leashed and it will be better if he cooperates as he will get lots of praise and maybe some treats for being a good boy. Be persistent and consistent and he'll learn to love his leash. Good luck.