*Why is Cuttlebone Important? ---Bird cuttlebone have a relatively high calcium content and are mainly used to supplement calcium for birds.Especially when the female birds have a high demand for calcium during the laying and breeding period, so they should eat more of this. ---Cuddle bone has a rough texture, making it an ideal tool to help support beak strength. Birds can use cuttlebones to help keep their beaks trimmed and sharp. ---Ideal for small pet gnawing pets to keep their teeth clean, healthy and trim, is great for mental stimulation. ---100% natural cuttlebone is suitable for birds, parakeets, parrots, tortoise, guinea pigs, rabbits and other rodents. *Why choose our this cuttlebone? ---Each large cuttlebone length is about 6.29"-7", thickness is about 0.25"-1", larger than the average commercially available cuttlebones, birds can eat for a longer time. ---100% Natural , definitely not made of cuttlebone powder! ---Also provide 4pcs same size cuttlebone replacement ---Case package, prevent break *Instructions: How to Put Cuttlebone in a Cage? Hang the plastic holder on your bird's cage and put the cuttlebone in it for your bird to chew on .