I would say YES feed the rosy a larger prey item (peachies-pink mice that have just grown some hair on them). At least you could feed it two pinks one after the other. I have a young Harquahala that is insatiable and he eats large pinks every four or five days. I have fed him two sometimes to tide him over. He does not try to attack and eat my hand when he is well fed. This is just my two cents.