It could be husbandry issues, what do you keep them in (enclosure, size, material)? What kind of substrate, prey size and what are your temps? Pits can be tricky sometimes as everyone knows an I have recently learned.
I had an albino northern that would not eat adult mice in which with his size was more than capable. At first I decided to scent the larger mice with the smaller fuzzies mouth and backend. The Pine would then eat the larger prey everytime. I, a little bit later was trying to get him to take adult mice without scenting them and he was not interested so I checked my temps as he was in the bottom of my rack and low and behold he was about 3-5 degrees cooler then the rest. I simply chaned rooms and upped temps and he began to take large mice without scenting and without hesitation. I dont know the size of your girls but try offering them the smallest prey you can and see if they eat it. If successful scent the larger prey with them and see if they will eat them. Also go over you temps, enclosure size, hides ECT.
I am in PA and the albino is the only one out of my 7 pines that I have had any issue with which in the end was my own fault. Good luck and I hope it works out.

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