I've been on the next mountain watching my friend make up a batch of feed for his Fayoumies.
To say I'm stunned is an understatement. There are no grains in the feed.
There were more herbs than I knew the name of in any language, each to supply certain vitamins and minerals. The nearest thing to anything that I might feed the chickens here was some alfalfa.
The feed is basically meat and quite a lot of it. There were also some seed pods that he gets sent from Egypt. Apparently they are part of the staple diet of the original Fayoumies.
These chickens roost either in his open loft with one of his dogs, or in the trees, depending on the weather mostly. He now has 11 breeding pairs all free ranging. He says his eldest is 12 years old and she has arthritis.

I've been trying to get to spend more time with this guy for a while now but don't wish to impose. Apart from being what I would describe as a good man he knows an awful lot about chickens that I don't and each time we talk I learn something.
I also had a look in his laboratory/clinic. He's well kitted out including a large stainless steel table with a grip mat and a microscope, plus a proper specimen fridge.