Hi and welcome to the KittyCatS family!!!
Your kitties will need Kibble, which you can get from the main store here:
KittyCatS! Main Store
The only exception to that is if the cats are perma pets.
We have a manual full of great information here:
KitttyCatS! Manual
We have a wonderful community and staff that are always happy to help with any questions you have. If you haven't already, you might want to join our in world group 'KittyCatS Addicts'.
If you have any issues or questions, feel free to message me here or in world!
-FoxieCat