Karl I know the kind of heat you are talking about because we lived in Tucson for a few years you will seriously need the shade, plus an overhang to make the shade last longer into the afternoon.
You might want to consider a misting system as well.
Now is also a good time to evaluate your plantings for toxicity. As much as I hate to admit it, my 6 girls free range our yard and they've eaten or torn up pretty much everything! (We're in the south east now)
Garden, grass, shrubs...1 chicken alone can tear out a flower bed in the time it takes to take a shower! Lol
I'm thinking about changes for the spring to limit where they can roam and scratch and dig and dustbathe and what areas will be off limits.