Papa Bear (Eddie)
Mama Bear (Sammy)
Baby Bear (Buster), and it fits just right.
The Grand Poobah.
Oops Addendum - I see by the comments that my sarcasm wasn't delivered very well. There's only one walled bed. It's Buster's. The other dog beds are pads, back in our room which is where the other dogs prefer to sleep, unless they think they it will bother Buster and then they'll steal into his bed. It doesn't last long because it's too uncomfortable but they're marked his territory. The dynamics of these four animals are pretty convoluted.