A couple of horrible old plastic, much chewed beds, which move round the house according to the temperature. They are filled with old duvets, which get thrown out & replaced when they get too stinky. They generally all climb into one bed....
As part of crate bed... he always pull out his duvet and put it where the sun is!
Folded summer single duvet and cover... i found this very easy cos boris likes to demolish foam bed, or anything that resassembles fur!! and the cover is easily washed... the duvet is so cheap to replace unlike alot of dog beds!
My boys have a single mattress in their Summer Quarters (the entrance hall) they reckon that now their water freezes as soon as it is put down it is too cold for them, but they still go in there during the day. Now they sleep downstairs in the basement, on a Queensize Beanie Bed.
Solved the water freezing dilemma, we now have heated doggy bowls in the hallway and barn for the cats.