K&H Pet Products Lectro-Kennel Deluxe Cover Medium Gray 16.5" x 22.5"

Can this be placed in an igloo doghouse under another dog bed? My dogs will chew if I leave it uncovered.....

My current pad cover has a thing layer of foam over the heating part. W/ this pad is that not needed??

how long is the cord?

What is the wattage of this pad?