Oh No, I hope he's not gone for good.
It's a long shot, but since you live in a neighborhood and I doubt chickens are the norm, try calling the local animal control, maybe he got out of your yard pecking around or was chased off by a cat and someone called in on him. Of course, they might...
Sounds to me like Rodney picked the right person to adopt ... lol
You've done a great job, it's nice to see a "first timer" taking such good care of his feathered friends. I bet you never thought chickens could be this interesting and fun.
The suspense is killin me, have you gotten Rodney in...