Lectro heating pad http://www.amazon.com/Lectro-Kennel-.../dp/B0002IEQMS

Before I bought these I lined the crate with Bermuda hay then covered with a flat sheet so no hay is exposed to the dog ( cleanliness). This way there's insulation between the dog and the floor. The hay will also hold body heat well. I also keep the crate covered with a flat sheet as well, and crank the heat up to the mid 80's.

I lost one that chilled, it was my fault and I'll never forget failing my boy....so this may be overkill but it's what I do.


Good luck to you!

S_B