You should probably get a harnass too, that's better to walk them on than a collar. Also, some nutrical. It's good for if they get hypoglocemic. I personally haven't had to use it for both my pups, but it's good to have just in case. Definitely get some treats too, especially if you plan on rewarding going to the bathroom with treats. I do and think it helps, especially at first.
I'm sure there are other things, but that's all I can think of for now. I'm sure others willl respond!
Good luck and have fun, buying all kinds of stuff is half the fun!
