Look at the bottom of his feet. If there are bumps, kinda like carbunkles, can't think of another way to explain it, or large swollen bumps, he might have bumblefoot. I'm dealing with it on one of my geese...not fun.
I could not see anything yesterday, both looked fine. But if I can get a hold of him today I'll take pics cuz maybe I'm missing something. I tried grabbing him today when I was letting the rest out but that failed. He's out there limping around again. :-(