Sounds like two things, one you did just fine, and two it may not be all too serious.
I like to keep a low block on the floor in the coop, the chicks and poults LOVE to hop on top of things. And since no one likes to be left out, your straggler may get some quality physical therapy in the process. Just make it a square piece of 1x6 or 2x4 so they don't crash too hard jumping willy-nilly.
Will try that too. Thanks again!