Will snakes eat hairless rat prey?

[accidental777]

Double rex patchwork is just a hair trait, it doesn't have anything to do with how well they lactates and they do fine as moms.

Question? How hairless does a patchwork have to be to be considered hairless? I have a few that are somewhere in between there. Does anyone have pictures that may help?
It is possible that the non-productive females I have are more double rex than hairless (they only have hair on their bellies/lower sides). But they still do not care for litters.
In any case it would be awesome to gain some clarification. It does seem that I have some patchwork females that do ok raising litters, while the ones that have less hair do not do well. I would say the ones that are lest than 30% covered in hair.