Could be what inspired them last time as it was after I was away on vacation (they weren't fed by my cousin when she took care of the cats - made it easier for them to skip a few days then deal with run away crickets. )

Generally they are fed every 2-3 days. I buy 50-80 crickets depending on
1) if its been the 2 or 3 days in between
2) how many crickets I have spotted hiding in the rocks
3) if there were a lot of crickets who drowned the time before.