Somehow a stray cat has found it's way into our unfinished basement. we have 2 older cats and a chihuahua as well. I removed our pet's food dishes from the unfinished basement and left the door open with hopes that the stray will leave on it's own. I *believe* the stray is hiding in a tiny 1 ft x 1 ft hole in a corner of our basment. Any tips/advice would be greatly appreciated.