Zoo Med Laboratories SZMTB1 Turtle Bone 4 count turtle bones (2 packs of 2) The rough edible surface helps prevent overgrown beaks Helps curb unwanted chewing behavior in pet turtles and tortoises Turtle Bone provides habitat enrichment and supplementary calcium on an "as needed" basis A natural floating source of calcium for all species of aquatic and terrestrial turtles and tortoises