I had 5 dogs, and finding a acessible, practical, washable, fast drying dog bed for them wasn´t easy. So me and my wife made the first dog bed. We realized we had to make some changes like putting two holes so the air inside the filling could get out, otherwise the bed looked like a balloon.
The bed has a inner pillow that is waterproof, and a outer layer like duvet that is washed more often.
Then I started thinking of a system like the sleeping bags that you can connect two sleeping bags using the zipper.
The idea is to have the long lasting inner pillow and somewhat acessible and fashionable outer layer that is easy to wash and quick to dry.