Greyhounds enjoy resting on beds and sofas, often sleeping or dozing 16 hours a day or more. They often "dig up" their bedding materials like blankets to create a pile that can cushion their deep rib cage, which can make it difficult for them to get comfortable. Particularly common in sleeping among Greyhounds is the so-called "roach" or "cockroach" sleeping position, in which a Greyhound will roll onto his/her back and spread his/her legs at odd angles in all directions, in a position reminiscent of deceased cockroaches who are often found on their backs.