Yeah - it's great to have the rain after the drought this summer, isn't it?
12X12 sounds like a really nice house for your RIRs.
I bet they love all that room!!
I let mine out (8 mos old) and they seem to love it - the rain brings up the worms & bugs and they love scratching through all the wet leaves. If it starts raining hard, they run for the hoop coop and stay there until it passes and then head out again.
The entrance to my hoop coop run is a mess, as well. This is my first year for chickens, so I'm learning as I go. Plus, we haven't had rain in how many months???
Tomorrow, I'm adding a clear vinyl windbreak to the west end/door and may put a layer of bricks in front of their nesting boxes (nearly ground level), which is where most of the mud is. I also ordered a 16x16 clear tarp (to replace the dark blue one) to cover the HC, so they should get a nice greenhouse effect in there, lol.
Just be sure they have on their downy coats and send them out to play!