Hop, skip and jump over to this hypoallergenic roo treat. Kangaroo bones are robust with ultra-rich calcium and enticing phosphorous. This dog treat contains no preservatives or colours – it's made from 100% free range Australian kangaroo backbone! This kangaroo backbone has its own unique shape, giving dogs an extra challenge when tackling chewtime. We call it the Roomerang ‘cause your doggos will keep coming back for more!