Behavior modification?

I took her basic obedience class. It was a lot of fun and we learned basics, like sit, down, leave it, (drop it—which obviously didn't stick with Henry), and coming when called. She's really funny and good with people and dogs. Someone here may want to correct me if I'm wrong, but I think she mainly uses positive reinforcement (treat based methods) and clicker training. I'm not sure what she does, though, for one-on-one behavior modification with specific problems.
Henry (who is the most food motivated dog I've ever met) for some reason, doesn't really respond to clicker training. I decided to go with something different for his bigger problems (leash aggression, stealing toys from other dogs, stealing food from people etc...). Now, I'm working privately with a trainer who uses Natural Dog Training methods. I learned about this from someone at the park who I think has an amazing relationship with her dog. Only had one session so far, so we'll see how it goes.

Maybe I'll see you around the neighborhood soon and I can tell you more about both experiences.

You could also ask for advice on trainers/ball obsession on urbanhound. http://ny.urbanhound.com/houndTalk/default.asp
My trainer posts answers there regularly and so does another trainer who has completely different methods than mine. It can be really helpful.