Thank you for sharing your experience with us. Cats Not Using New Litter - This is a common problem as cats are fussy about changing their habits or environment.
In our experience, there are several things you can try:
1. Mix a small amount of new litter with the old, and gradually increase the amount of new litter each day. You can also fill the box with new litter and top it off with old litter.
2. Cats are clean animals and won't use a dirty litter box. Scoop the litter once or twice a day, and clean the box thoroughly once a week.
3. Put the new box next to or close to the old box, and keep the old box around until your cat starts to use the new one.
4. Praise your cat when they use the new box, and offer treats.
5. Some cats may take longer to adjust than others, so don't rush the process.