I was lucky enough that oakleys breeder dremeled so I carried on with it and after routinely doing it he is very good about it. Even at three I still make a big deal after he's done by telling him he's a good boy and give him a cookie. At any point in time he can decide he doesn't want to do it or doesn't like it so I find keeping it positive keeps him on the hook!
I also got mine via petedge.com.. I got the grey and blue one; I believe it's actually the Dremel brand