The grays are real easy to care for and believe it or not, inexpensive to feed. You can winter them over in a 20 long tank using eco earth and a think layer of leaves along with lots of fake plants and branches to hang out on. Just make sure you dust their feeders alternating it with calcium and then a multi-vita powder every other day. And there are tons of places to either pin head crickets or newly hatched red runner roaches (my preferred feeder bug). Also the frog safe water is so important in caring for any frog or toad. I personally use fresh caught rainwater for all my amphibians. Then once late spring hits you can release them back into the wild. They'll be fine and you just increased their chance for survival. Do this with tiny toads that I find.