Sam and I start obedience classes next week. We had our first class last Monday, but it was just a "talking" class. We actually start working next Monday. We can't train with choke chains or prong collars, but can train with a Martingale. I bought one at Petsmart that is nylon/chain. I like it, but the problem is that I have to loosen it to get it over Sam's ears, but then tighten it on his neck so that it fits correctly. Well, with a 10 month old puppy, you can imagine how much patience he has with that! I read that you can buy a collar that has a release on the side so that you don't have to adjust every time you put it on and take it off, but can't find one on the internet. Any suggestions from you experts out there? I really like the nylon/chain combination because it gets his attention better. But if you have better suggestions, I'm sure open to anything. Thanks!