You got me thinking on that, Bee.... Do chickens get gout?
Evidently, they do. And it causes swollen joints, limping, etc...
Good call there!
http://www.peteducation.com/article.cfm?c=15+1829&aid=2497
Actually, high calcium can cause gout. We had one boy that had it in one leg. We had to really watch what he ate. I generally do a mix of layer and grower/finisher {which is the all flock stuff}. When we made him his own food with just the all flock, he was better.
There are studies that show higher calcium can cause kidney damage and several that linked gout to excess calcium, iir.