Beautiful birds! Someone's put in some serious time and attention on the breed. Some of the best leg scaling I've seen on this site so far, too. I was beginning to think only Aussie chooks had normal leg scaling almost as a rule...
If I'm not very mistaken, there's nettle growing around their run. Is that deliberate as a dietary addition or a hedge?
Also, why are the images labelled as 'aracuana' when I look at them in a new window?
I notice they also have what appears to be a plant from the milkweed family, possibly dandelion, I'm not sure since the bird's in the way... Is that a deliberate run addition? I'm not sure about some of the other plants but they ring a bell, though not for poultry use offhand.
Very nice nettles too, healthy looking. I harvest them, dry them, and add them to tea, soup, stew, stir-fries, stuffing in roast birds, and also add it to chook feed as it's one of the most nutritious land plants, and I give it to all my animals. Recently I used it to help my cat with serious bladder issues. But being stinging nettles they can't eat them raw, however you might have non-stinging nettle, I'm not sure.
The milkweed family would likely be a good emergency liver detoxer for your birds if in need. I use them for my animals for that, but it's good for people too. I have planted some plants to attract bugs for chooks, too.