I've been RPing for a while here, and I have to say your description is.... lacking. I may come off as pompus, but trust me, I've seen alot of good RP Ideas ruined by bad plot or desription. some things you may want to consider:
Will the potential RPer know what this RP comes from?
Willl the potential RPer know what I mean if I say this?
If not, how can I write it so they will understand?
I personally, while I do think the idea sounds interesting, have absolutely no idea what the RP itself is about. These sort of questions come to my mind:
Are the cat's human in shape, or regular house cats?
In what world dose this RP take place?
What is the storyline for this RPverse like before the RP starts?
What is this RP based off of?
I may sound pompus or the like, but I mean this in the purest way of trying to help you get members for a hopefully wonderful RP, that, with better understanding, I would hope to join.
Sorry to be a nuisance, or glad to be a help;
~Silvertail~