Awesome Man! You went with the name Mr. Chompers after all. Glad to see.
If you are trying to train you rhom to be more finger chaser try this...
What I do with my BDR is I wiggle my fingers in his visible area and when he stares at it and acknowledges it I pull away from him. I then try to get its attention again by wiggling my fingers in its face and again when he acknowledges it pull my hand away immediately.
What this does is simulate that i am trying to get at him and his space and it sparks like a defensive mode out of him. The reason you pull your hand right when he sees your wiggling fingers is because it gives your piranha satisfaction that he has ran you off and that it was successful in defending itself.
So the more it scares your hand off the more it gets confidence and it will feel like a boss owning its fish tank home. That was how I trained my rhom to want to attack everytime I harass it. So now my BDR is a champ at finger chasing. Would you like to see a video to show you?
Hope my advice helps...
