You can try offering the snakes that are eating live hoppers a live fuzzie. After they are done with that meal, offer them a F/T fuzzie and see if they'll take it. Try that about 4 times and then try to offer a F/T hopper without a live mouse. I'm sure with your one ball that is eating live fuzzies. You can do that trick with just fuzzies instead of going down a size. You could also try rubbing a live mouse on a F/T. One thing i tried and it worked for my first attempt on my pinstripe was i would let the mouse defrost on top of his enclosure. It allowed the snake to smell that there was a mouse present. It got him real excited and when i warmed up the mouse with warm water, i offered and he took it without a problem. You can use a blow dryer as well to warm the head of the mouse. Hope this helps.