Hi, there. I might have posted this somewhere else, but we were having temps of 100. My girls hang out under two big spruce trees when it gets hot. I wet down the entire area under there (your mud idea). But the best thing I've found -- it lowers the temp by almost 20 degrees under there -- is the misting hoses. You can find them at Home Depot, etc. I have two, and each is 20 feet long. I string them up in the trees and they mist the whole area under there. Evaporative cooling. They work GREAT. I'd say I have mine hung about 6-8 feet above the ground. Every tiny breeze that comes along, it cools it even more. The chickens soon get the idea that the mist of water is cooler than the surrounding area.
Another thing I'm going to build and put in my coop for night (hot in there, too) is this ice chest AC. I do have power in my coop for the fan, but can run off solar or RV battery.
Apparently you can do sort of the same thing by putting an ice block in a pan and running a fan so it blows over the ice into the coop.
I also freeze large "ice cubes" by cutting off the top of 2 liter soda bottles (the ones with straight sides, not hourglass), filling them with water and freezing them. I then put the cubes in their waterers. I've heard you can just put big ice blocks in pans around where they hang out in trays too. And also in their coop. Haven't tried that though.
Really, though, the misters are the best investment I've ever made for them. Have not lost a chicken yet. Good luck.
Another thing I'm going to build and put in my coop for night (hot in there, too) is this ice chest AC. I do have power in my coop for the fan, but can run off solar or RV battery.
Apparently you can do sort of the same thing by putting an ice block in a pan and running a fan so it blows over the ice into the coop.
I also freeze large "ice cubes" by cutting off the top of 2 liter soda bottles (the ones with straight sides, not hourglass), filling them with water and freezing them. I then put the cubes in their waterers. I've heard you can just put big ice blocks in pans around where they hang out in trays too. And also in their coop. Haven't tried that though.
Really, though, the misters are the best investment I've ever made for them. Have not lost a chicken yet. Good luck.