Returning player from 10 years ago with questions

[sparkleybatman]

So obviously I understand the dog staff litters use to be in November then got changed to September.
How do I know which litter are the staff cats? How can I tell the difference? I tried looking for a thread already and couldn't find one, if I missed it please link it for me!

[sugacubes]

here's a link to the general helper cat litter guide!! they are released in june :3

[sparkleybatman]

here's a link to the general helper cat litter guide!! they are released in june :3

Thank you!!!!