Penn Plax Sand Sheets are disposable cage liners for the base of bird cages, made with crushed sea shells. The large 43 x 28cm sheets are sold in a 7-pack, suited to regular replacement and compatible with most standard cage footprints.

The crushed shell material provides a grit source that aids digestion in hard-billed birds — grit helps break down seeds in the gizzard — and adds calcium to the cage environment. As birds walk across the textured surface, the abrasion contributes to natural beak and claw wear over time. Disposable design means removing the soiled sheet takes the mess with it, without scooping.

Bird owners who find loose substrate messy or time-consuming to change tend to prefer sheet-format liners — there's nothing to scoop, and the sand content still delivers the grit and hygiene benefits. A 7-pack makes it easy to keep a supply on hand for weekly changes.