The Canary and Finch Gravel is a digestive aid for small sized birds. Hagen Canary and Finch Gravel is a hygienic digestive aid and nature's substitute for teeth. Correctly sized for small birds, gravel is required by all seed eating birds to grind seeds and digest food. In addition, Hagen Gravel contains oyster shells to supply added calcium for stronger bones. Flaked charcoal has also been added to combat hyperacidity, and absorb potential toxins produced during normal digestive processes, or due to medication.
