Feed = Growth = Shed
Underfed BP means most if not all of the prey is use for vital body functions allowing little to nothing for growth.
The average animal get started on hopper mouse or crawler rats quickly moving through sizes. Pinky mice are colubrid food.
If your BP has issue feeding lack of interest and such there are likely some husbandry issues as well not to.mention that such a small prey is more often harder for them to it and sometime not recognize as a prey at all.
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