This was written by the makers of the new Breeze Litter System that I recently reviewed. Every cat is different, and the first tip can be applied to any type of change in litter.
FIRST: Before setting up your new BREEZE Litter System, sprinkle 1-2 cups of the BREEZE Litter Pellets on top of your existing litter in your OLD box(es). This gradual introduction of the BREEZE Litter Pellets mixing with the existing litter in the OLD box(es) helps ease the transition for your cat(s). Note: If you feel your cat(s) needs it, you can add up to a full bag of pellets to your existing litter to help her adjust.
SECOND: Once your cat(s) is faithfully using the old box(es) with the mix of BREEZE Litter Pellets and the old litter, place the BREEZE Litter System next to the old litter box(es). Place a BREEZE Cat Pad in the drawer of the BREEZE Litter System, soft side up, and slide the drawer into the base. Fill the top portion of the BREEZE Litter System with one package of BREEZE Litter Pellets. If the old litter box is NOT high-sided or hooded, remove the BREEZE™ sidewall piece. (Once your cat has successfully adjusted to the new system, replace the sidewall.)
THIRD: Stop cleaning the old litter box(es). Cats like to keep clean. This step will encourage them to use the new system by making it the only pleasant litter option. In the short-term, the old litter box may look and smell gross, but this is an important step in helping your cat(s) switch to the new system. The long-term benefits of BREEZE™ definitely outweigh the short-term discomfort! When your cat(s) starts using the new Litter System for both pee and poop, remove the old box(es) and continue using BREEZE™ as directed. Remember, every cat is different, and these are only tips to help with a transfer to a new system.