Uhhh....this must be about Texas, but anyway....
the only thing your dog needs to stay warm if you actually think the critter is cold (which it isn't, trust me), is to give the dog some pure RAW fat every day to eat. Beef, pig, deer--whatever. They'll take care of themselves just fine so long as you let them get out of the wind somewhere.
BTW--it's negative 5F this morning, and there are dogs all throughout the neighborhood that spent the night outside just fine, including little ones. Don't bring them in the house unless you plan on keeping them there permanently.
