I am late to the party, but a place we can go specifically for help with discussing disabled chickens would be immensely helpful. Like OP, I've spent hours and hours every day trying to find any scraps of information I can.
While I understand why the decision to not have a specific subforum was made, I hope it will be reconsidered in time. The term disabled covers a very huge and diverse array of issues that I don't think can be adequately addressed in a megathread. Maybe if this was more akin to Reddit, where comment chains function as self-contained threads within a megathread, but with the way this forum is set up I think a subforum would be more intuitive for members to understand and access.
Additionally, I find it a lot more helpful to be able to ask questions to and discuss the difficulties of raising a chicken with disabilities amongst people who understand what you're going through and what it takes. In my experience with just trying to discuss my own human disabilities, you are much more likely to get actual help and develop much-needed community with those who are familiar with disabilities themselves, rather than trying to discuss/get help for said disabilities in the standard subforums which are majority populated by the non-disabled.