He was showing signs of some type of sickness and was the only one showing. We segregated him this morning and I made the decision to cull him tonight. He also seemed to have a genetic defect in that his beak would not close all the way. Not something that needed to be passed on in any case. I'm new to chickens but I know that I can't put the rest(as well as the wild birds) at risk for one bird. Plus I have horses and The Three Encephalitises are endemic here. Still, he seemed like a nice sort. We made it quick and are burning him now.