Wonderful news on the bumblefoot. I do think it is hard for us to keep our 'domestic chickens AKA pets 'lean and mean' so to speak. Unlike wild birds, they have constant access to food, plus treats (even when healthy and in moderation). They don't have to work anywhere near as hard for their food, and even if 'full' when treats are introduced (even if it is healthy veggie bits and fruit), they will grab as much as they can 'before the others get it'. And it is even worse if they can't free range most of the day (mine can only do so on weekends, or for a few hours each evening (now that it is light later) after I get home from work) I have started to limit their feed some by only putting pout enough feed to last them through 2pm. Then no more until evening....after they have free ranged but before bedtime (i.e. about the time they are thinking of going to bed and come back to the run...but not yet into the coop.)
Exception: my broodies have access to food constantly, so anytime they feel like getting up to poop, eat, drink. bathe, they have it!)
I'm not sure how I am going to handle it once winter hits, as I feel it is too cold for them to be without food, and it is dark by the time I get home, so they only free range weekends. (And then, only in a limited area that I shovel out for them...so while decent size, still limiting and no real 'food' to be had.)