Insulation of course; soft, warm blankets, and a doggie heating
pad. They're just like a regular heating pad but made to be
waterproof and to not overheat. Foster & Smith has them; I buy
there often for odds and ends.
Be sure the house is the right size.
Most dogs don't need extra heat unless the weather is really
severe or windy. Some even prefer it cold, or what we'd call
cold, anyway.
Prevent drafts from getting into the doorway if possible.
It's dampness and drafts that make a dog cold. Otherwise his
body fur is great at holding heat in.
If the dog can get nice and cozy in some warm blankets the
little electric pad makes them nice and toasty.
Just for safety's sake, I'd get one of those portable GFCI's
to plug it into just in case something goes wrong.
Do NOT use a lightbulb or human heating pad; dangerous in more
ways than one. It has to be a gentle, low heat source. You
don't want to warm the air, you want to warm the animal. Also be
sure there is a way to lay without being on it too, in case it's
too hot and you don't realize it.
I had a newfie learned to turn his on and off on his own,
believe it or not! Smartest dog I ever had. Miss him a lot!

"DoDa" wrote in message
...
: Looking for any ideas on the best way to heat a doghouse for
the winter?
:
: Donna
:
: