Sorry for my weird post. I literally fell asleep! I am pretty sure I intended to share a link to a post about bumblefoot but don't remember what link!
This is one I keep bookmarked. But surgery isn't always required. The height of your perches should also be lowered as that is the possible cause.
https://www.backyardchickens.com/t/236649/bumblefoot-surgery-with-pics-and-how-to