You know, I've been following this thread and reading everyone's suggestions with great interest, but have come to the conclusion that the only way to keep them off those rafters is to slap some chicken wire all across the entire inside (like a false ceiling). You could use those plastic zip...
The only way I know of doing it would be to re-post to the correct thread, this time with all your great pictures, and it should start giving you some greater advice....I wish you all the best!
Thanks for the pics....yes, you DO have a bit of a dilemma going on there for sure. Quite frankly, I don't know how to advise you on those aluminum rafters, except to say they need blocking off for sure.
I noticed just now that you started this thread in the wrong area. Your thread is in...
Sounds like a bit of readjusting and rebuilding is in order here! You are correct in your assumption about putting those foam wrap-pipes around those rafters...no! If they ingest that stuff it can kill them.
Can you please post some pictures of your entire setup...coop, run, interior shots...