I feed small as well. I geneally go with rat weanlings for even my largest girls and They eat weekly. Depending on how large they are they may get a size up or more than one. But at the same time I've got 4 that have stopped at somewhere about 1000-1300. The one that hasn't was very stressed in the bigger tub and was defense striking everything and I put her back in the smaller and that stopped and she resumed eating and hasn't stopped.