Welcome to the Forum-sounds like you've made a new friend! Is there anyway you can post a picture of Kermit? We like to know what species we are dealing with before we offer advice. Most frogs and toads know when to start getting ready for winter and bulk up with food and settle into a place to hibernate for the winter. Not all of them make it, true, but that is the course of Mother Nature. The decision to bring it inside and look after it is a personal one. However, once you bring it in and look after it for the long cold months of winter, it may be yours for the rest of its life as it is not recommended to release a frog back into the wild once it has been held captive for a long length of time.