Maybe switch everyone over on an All Flock type feed?
Chick feed shouldn't have been the cause, since calcium is lower. It's very much the same as Flock Raiser feed.
Tart Cherry will help with regular arthritis also. It is a joint health supplement.
Gout is also a form of arthritis.
Could try Glucosamine, which is for joint health too. It's also naturally occurring in the joints.
Could use that, maybe twice a day. But I found what I use.
Spring Valley Tart Cherry Extract for Joint Health, 1200 Mg, 90 Capsules https://a.co/d/2hqDbzn