Kudzu?

[Moonwalker]

If you want to try feeding it to your birds, I would go to an established patch and harvest LEAVES ONLY! and don't leave it laying around in a heap.
Kudzu flowers have a smell almost like jasmine and would probably make a wonderful perfume.

 

[smoothmule]

I've also read that cattle can graze it. I know why they want to erradicate it but I don't know why they don't do more to utilize it. Maybe because there are so few cattle operations in the area?
I think someone should be looking into using the stuff.
Here's one of many links to the usefulness of the vine that ate Georgia. Maybe it's time it got ate back
http://www.herbsarespecial.com.au/free-herb-information/kudzu.html

If pigs, cattle, horses and goats get nutrition from it, I see no reason that poultry can't benefit from it in controlled amounts as well.