I started trying to clicker train my bun as a way to spend more time with her, and found this article on the House Rabbit Society website helpful for learning a little more about clicker training:
http://www.rabbit.org/journal/4-12/clicker.html
(And another good site – http://www.rabbitawarenessweek.co.uk/behaviour/how-to-clicker-train-your-rabbit/)
I am still working on associating the click with the treats, so I can’t report back about successful it is! (And in my case, treats = pellets, since she is on a diet.)
Also, I got the PetSmart brand clicker (it was only like $2-$3), and I feel that it is really loud! It was in plastic wrap, so I couldn’t “test” it before I bought it. Some things I read said that you can even use just a retractable pen with a clicker, if you want to try it out before you make it out to a pet store. I think most recommend using an object instead of a sound with your mouth, just so you don’t get tired of making that sound and so that it is the same exact sound every single time. Anyways, I’m no expert but I hope this helps!