Plastic grocery bags
Two rubber hot water bags
Hot water
Twine
Instructions
Purchase a standard pillowcase. If you have a large dog, you may need to use a case that is intended for a body pillow.
Wash and dry the pillowcase.
Fill the pillowcase with several balled up plastic grocery bags. The bags will provide comfort for the dog and can be thrown in the garbage if the dog has an accident. Leave room for the heating apparatus in the case.
Fill two rubber hot water bags with very hot but not boiling, water.
Place the bags inside the pillowcase.
Tie the pillow case shut with a piece of twine. This will ensure that the dog does not attempt to destroy the plastic bags inside.