I got pointed to this article.
It's very very slow progress but some are at last learning.
https://ouroneacrefarm.com/2014/05/05/creating-chicken-habitat-advice-red-jungle-fowl/
I try...

One of the places my girls love, when they are allowed to go there [they fence hop into the neighbours so it's restricted access only
] Is my big patch of shell ginger. They love it so much I am considering trying to establish a patch in their run. It's just getting it to the point they can't promptly grub it out.

My fence hoppers have killed one passionfruit off but the other is starting to spread over the coop roof where hopefully it will not only provide shade but entertainment when the fruit starts dangling. I'm going to try a choko @ the other end. They took out all my herbs ~ which I had hoped would grow big enough they could eat what grew through the wire but nope ~ they hop the fence just to clean them up
I am lucky to have some really big trees that the man is willing to build around just to keep my chickens happy.

.....and they didn't need to use their toes.