Missing Cat

Description:

He's a roughly 8 month old indoor / outdoor brown and black tabby cat with white feet, a white patch on the underside of his neck, and a white patch on his belly, who didn't come yesterday. We last saw him at the house yesterday morning (7ish on the 16th), but he hasn't been seen since we all got home from school and work. He had on a black collar with little spikes (different from the one in the picture), along with his ID tag with our numbers and his name, Napoleon