is this cage just covering just the top of the pool? if a racoon or any other rodent wanted in there, i think chewing through that plastic overnight would be a breeze. I do like that idea tho. possibliy put some 2x12's as sides and a plywood bottom, prolly w holes for drainage. Then i'd agree about it being varmit proof. I thought my rabbit cage was pretty fortifide, came out one morning and there was only 1 rabbit left.What kind of frogs are in there?