Puppies are just plain fun!
I have a few dogs over 10 yrs, so I have to keep a heating pad on in a larger pen for their comfort. I buy the egg shell mattress pad covers and cut them up to the size of a standard pillow case. This way I can wash the pillow case very frequently. The egg shell pads rinse off very easily and can be thrown away if they are soiled.
Bruno playing with his ball.