Is that the pregnant one that was poking around your yard? I have one stray I feed, I've tried to bring him inside but he won't have it. He gets a bowl full of dry kibble and a quarter can of cat food a day. My father in law feeds his strays with a full can of food a day, lol. But yeah, if you don't have cat food, canned tuna or chicken (preferably packed in water) will do.