Feeding my KSB

Hello, so I have had my Kenyan sand boa for about 7 months. We have tried everything to get her to eat f/t which is what the breeder told us she was being fed. She has ate a few times. But has gone about a month between eating and as long as 6 weeks. She has also attacked and then not eaten multiple times. We got a baby ball python that is currently on live fuzzys. We decided to try to feed our KSB one and she ate right away. Would you guys recommend upping the size of the live prey and feeding her that way as she has now eaten two meals quickly with no issues? Would it be okay to be feeding her fuzzies weekly? Just to make sure the mice can’t hurt her? Thanks for the advice