serious questions about rats and cats. my house in SF has an unusual structure with 1.5 feet gap between a tile exterior and the inside wall. i got a rat that is living there. i dont have a cat and want to borrow a cat. we got lots of feral cats in the neighborhood. i figure out i will use some catnip to attract a few one night to take care of the rat. i have a 70 feet long driveway that is very steep. i figure i will use multiple piles of catnip/catfood to lure the cats up the driveway. any ideas? will it work? any downside risks? how far can a cat smell catnip from? how much should i use? thanks!