So you would like to offer your pets a space to relax by your window? The K&H Hooded Kitty Sill has you covered. It has a sturdy design capable of handling over 60 pounds of weight. It has adjustable snap-in legs. You can mount it to your window with 3 suction cups.
This K&H Hooded Kitty Sill has a orthopedic foam base, removable/washable cover, and built-in hood.