Lost Pet: Socks

Circumstances

He was in our fenced backyard and refused to come back inside. We left him unattended and waited until he got bored or hungry, but when it came time for the next feeding he didn?t respond. We can?t find him in the backyard or around our house, tried luring him out with bells and cans of food. He?s very slippery when he doesn?t want to be caught, but food is the most reliable incentive for him. He doesn?t scratch or bite and is cautious by nature, but he tunnel visions when he?s chasing something and I?m worried he?ll run into the street.