US Patent 7909003 Chew toys comprising biologically degradable material

An interconnected ring chain comprises a first ring comprising a biologically degradable material and having a first shape and a second ring comprising a biologically degradable material and having a second shape and interconnected with the first ring such that the first and second rings are both movable and substantially inseparable relative to each other. Each ring may be solid (continuous) or non-solid (discontinuous) such that the rings may be interconnected by mechanical or non-mechanical methods. A chain may be formed from rings having the same or various shapes.