I might build some such for my feral/stray crew.View attachment 256093 Mighty cold here in Minnesota in winter and the heat is on from October through April. So next to a heat vent is the perfect place for a cold kitty. This is Willows deluxe double decker cat bed that is up against a heat vent. The upper level is for lounging and watching birds and critters out the window. The lower level cave is for snuggling up right next to the vent for a cozy warm snooze