My girls have been home for two weeks and they are good eaters, but only one of them is regular, having defiled her cage twice, and me once. On the other hand, one of them hasn't soiled her cage once.

She seems to be in excrement health, and her activity shows her to be far from pooped, but she doesn't seem to be very defecated to eliminating herself of waste.

Is there anything that can be dung for her?
Should I stop feeding her until she unloads?