We have a training collar that we use on Bunny, since she gets overly excited and jumpy when we have people over. She's also a toe licker... Its one with the remote, has a 1-5 setting and it beeps and shocks. It works great for her. We can even have her outside off leash and she will respond with just the beeps of the collar. We dont even have to shock her anymore. She's learned that where there's a beep, there will be a shock if she doesnt listen. Of course, she's also learned that just having it on means behave.

I've never put it on Eli, as I think he would freak out, and doesnt need it either. I think it really depends on the dog if it will work or not.