When my ball was up to 3 mice a feeding, it was time to move her to small rats. I offered her a rat and she showed no intrest in it. I pulled the rat out put in a mouse and she nailed the mouse and ate. So I used a trick I had read about, I went to the pet store and got some good and used mouse beding and rubbed it all over the rat. I put the rat in with the snake and BAM! she took it like it was a mouse. She was so used to smelling mice and eating them that she decided that this aint a mouse cuz it dont smell like one. Well doing what I did fooled her since of smell enough that she gobbled up the rat like there was no tomorrow. When its time for her to eat again, I will just put the rat in with no mouse smell added and see what happens. If she dont take it I still have the mouse bedding ready to use again.