I don’t think they eat fleas. We lived one place that we had to flea-bomb; might have been right after we moved into the house in Broken Arrow.
I just don't know about these girls ("Little Sisters" of our frat); a year or two later I wound up with a small fridge. They'd abandoned it in the the carport; when I finally asked they complained it was because it froze everything. I figured a fridge that froze everything was probably repairable... though the first issue was to clean the months of accumulated mold & mildew (they'd abandoned it with the door closed). Some testing after that and it seemed to work just fine. Upon asking it turned out they knew nothing about defrosting refrigerators (were there "frost-free" fridges in the 70s?).
The youngest sionnsareen just arrived in SC. The house (here) is going to be very quiet the next two weeks...