This is so easy and cheap and it took someone else giving me this tip when Pennie was so little and losing heat.
Take tube sock, or a mans sock so you end up with something the size of a brick or a little smaller. Fill the sock with RICE, regular rice. Tie a knot at the opening. then place in the microwave until it is really warm, almost hot. I start of with about 45 seconds.
Knead it to mix hot spots. Then place under a blanket in their crate, they will cozy up to it. And the thing stays warm for several hours.
Works like a charm!!
