Well thats solved it was reallly JP.
Well Cindi, let me think a little here.
Its very strange that he is missing the same toenail on each foot.
I had a rooster that was born without one on each foot once.
What do you have him roosting on?
Dowels or sticks are not good for their feet. I use a 4 inch piece of lumber for my roosts.
They should not be curving their toes or feet around anything.
You may know this and this is not the issue for you but I am just throwing out possibilities so bear with me.
I know that they can lose a toenail and hurt their feet if they are jumping from roosts that are too high.
Jerry has a good point, he may be getting them caught on something and ripping them out. Is there anything around the yard you can think of that would be doing that?
I would also wonder if he went at it with another rooster, when they go at eachother with their feet I could easily see nails getting torn out.
The other thing is that a toe nail may have gotten accidentally ripped out and now its infected or its not infected but just too sore to walk on while it heals.
Maybe you can seal it up with some blue coate.
Lastly, even though he lost a toenail, is it possible that he actually hurt his leg and that is why he is favoring it?
It may be that his injury is his leg and the toenail missing is secondary.
Any chance at all that he has leg mites?
If it was colder right now my thoughts would be on frostbite. They can lose their combs, toes, wattles etc. to frostbite.
I know your chickens are well cared for but like I said I am just trying to come up with all possible scenarios.
I hope you can find out what is wrong with him and he feels better.