is there any thing i can do to help keep my ratties warm in the winter. my room is the basemnt and it stays a tad below room temp in the winter. do you think it would be a reasonable idea to put a heating pad on low under the rats tank?
If you wind up using a heating pad, put it on 1/2 the tank only and cover it with a towel (if a thick towel, one layer; if a thin towel, two layers or more). This way if they get too warm, they can move to the other side.
What Jade said! Also, fleece fabric is wonderful for holding heat. My rats get fleece hammocks and extra fleece fabric in their igloos and nest boxes during the winter. They like to snuggle up under it and have been known to drag it with them wherever they end up sleeping. You can get it by the yard at fabric stores and many times you can get it out of the left over remenants bin for pretty cheap.