Oh i think i'd be crazy not to go with the "Toffee Apple Red" colour hehehe

I think they'll sleep in there together if not Shadow will Hog it every night for sure as she loves getting all snuggled and burrowed in whereas Pebbles might put her body in and leave her head sticking out (she's a good watch dog hehehehe).
You should get one for your little snuggle bears Robin! They'd love it! I could just see Lily and Chloe's faces sticking out of one