Sweet little chap. What breed is he?
I picked up a new Wyandotte cockerel earlier this year and like you was given a choice of two. The prettiest was a total nutcase, probably because he lived a solitary life in a 3' x 2' box inside a shed with just a window at the front. So did the other, but he hadn't gone mad! He enjoyed his freedom so much that he started doodling as soon as I put him in the back of the car. Later he struggled with agoraphobia, but he's settled in fine now.
Worth thinking about that run surface. In conditions like that he will develop foot problems quickly.