if you have to keep it for a few days, give it some warmth, (like 30 degrees in a hot spot) try not to cook it!and a cool end at about 20degrees or room temp, something to hide under in a few places on sand. the easiest thing you could feed it is some fruit flies if you have a vit.m suppliment use that on the food, otherwise get some pin head crickets for it... only keep for two daze and release it. don't let anything bother it, even if you cant see it in your container i repeat DON"T PESTER IT. finally understand that for as long as you have a cat, this will keep happening.
good luck
ren