"Young ones - winter comes. Winter comes, and a great noise came from the home of the gentle goddess two nights ago. Since then, there has been no food, no water. Though it gives me sorrow, I must send you out into the world. You know how to hunt. You know how to find shelter. These, we have taught you. Now is the time for you to live or die on your own. You are no longer kittens, but cats full grown..."
And so, at the order of Dark-eye, the scarred matron of your colony, you are cast out of the foam and hay shelters you have known all your short lives, out into the wilderness of the realm of men, to walk your own way.
You come from a colony of feral cats: You have only rarely known the touch of a human, the gentle goddess that gives food and water, who created winter shelters for your colony. But now, she has stopped coming, that food and water has vanished, and you have gone out into the world to make your way, to find a way to live in the city.
To make a cat:
Choose a name and coloration.
There are four stats:
Choose one to be high, or two to be high, and one to be low. Stronger and Tougher cats are larger than weaker, frailer cats.
These stats will be used to weigh the success or failure of a d100 roll when chance is called for in a story. That said: Even the largest, cussedest tom will lose an outright tug of war with a pitbull.
Roll 1d100, tell me what you rolled - This will determine if you are polydactyl, and the degree of dexterity that you have with any thumbs that you may have.
There is no gear. You're cats. There won't be formal skills unless I have to really put my foot down. You can all hunt, move silently at will under most conditions, hide, and reasonably, just about anything else a cat might do.
Language and communication: You can talk to all other domestic cats with normal understanding. You can communicate with true wild cats and great cats, although this is difficult - Much as a modern English reader /can/ read Chaucer in the original tongue, it is fraught with lost "words", sound drifts, false cognates, and general lingustic drift, and the further away it is on the tree of life, the harder it is to comprehend. You are also capable of communicating with other domesticated animals in a kind of low level pidgin; this is the stamp of humanity upon your genes. You may even understand a small number of human words, though you certainly cannot speak them, and are completely illiterate.