Well, they are birds, BIG BIRDS! It has been so hot and so dry here. We have had less than an inch of rain for the whole month of June. My chickens like the bird bath even during normal conditions. They think it is just for them. Actually, birds don't really like this bird bath. I see a few birds come to this bird bath in the winter, but hardly ever in the summer.
My chickens also liked to go to my pond to drink and scratch around in the pine straw. Now I have fenced that off. They tear up my plants and flowers, so they have to drink else where. And they have lots of places they can scratch around.
The last picture is one of my Americaunas. She is getting that beard or thick feathers around the neck and face. The breed originally came from Chile, I believe. They are called ear tufted chickens and Easter-egg chickens. All but one is ear tufted now.