The soft side is the side that should be accessible to your bird. The cuttlebone can be attached to the side of the cage with a cuttlebone holder or clip. Each Cuttlebone measures between 8-10 inches.

What is Cuttlebone?
Cuttlebone is the thick internal, calcified shell called the cuttlebone of the cuttlefish which are found living in the ocean. It is compose primarily of calcium carbonate. It is a chambered, gas-filled shell used for buoyancy.