Ahh..couldn't see that board doesn't go all the way to far wall.
Raising pop door is good even if you don't use deep litter.
Don't think you need an angled board over the nests,
it's usually to keep them from standing on top of nests for whatever reason,
and thus pooping on/in them.
Door way barriers will be easy, just use 2 screws for easy removal when needed.
Hope you girl feels better real soon, hard to see them down like that.
Raising pop door is good even if you don't use deep litter.
Don't think you need an angled board over the nests,
it's usually to keep them from standing on top of nests for whatever reason,
and thus pooping on/in them.
Door way barriers will be easy, just use 2 screws for easy removal when needed.
Hope you girl feels better real soon, hard to see them down like that.