Bird Litter & Gravel
Bird litter is primarily for use in cages which have a solid bottom pull out tray which has a cage grate suspended over the top of it. The litter is designed to absorb liquid, and help bind together solids so that when the tray is pulled out, the litter can easily be removed along with the waste. Cage liners are designed primarily for use in cages which have solid bottoms that either have no removable tray, or the tray has no cage grate suspended over the top of it. Gravel paper has a rough surface which can help to file down a small bird's nails.