Unless your run is absolutely huge: giving each chicken about 100 s.f., the likelihood of maintaining growing grass is practically impossible.I really appreciate all the responses. And thanks for the tips for other breeds. Some I was aware of, and some not. LazyGardner, I had the same thought with the snow clumping, like on my dogs. that I can al least take care of in the tub, but the gals, I'm have concern for frostbite. Aart and others who mentioned the dirty nest, didnt think of that. I dont want to do the shavings thing. I only have mud in my run now because I followed some advise I read to throw my grass clippings in there. Every evidence of grass is gone now. I wish I kept the grass! I'm hoping I can kill two birds with one stone with pulling up some sod I dont want in one part of the yard, and transplanting it into the run. One idea I have going. so anyhow, thank you again, all, very much I had a hunch it was more maintenance I wanted to deal with. I cant even get myself to brush the dogs enough, and one of those is a havanese, if anyones familiar with their full coat.
My run is a work in progress. 500 s.f. requires a lot of bedding material to get it covered. I finished building the run late this summer, and have added to it as weather and materials allow. Grass clippings, shavings from the coop, leaves, wood chips, garden debris, basically any material I can get my hands on. I don't expect that I'll have it fully mulched till sometime next summer. When I built the run, I put 2 x 6 boards around the entire bottom with the goal of them holding in that bedding. Eventually, it will produce tons of compost for my gardens.Yeah, they'll like that!
and have it turned to dirt and roots within hours.
Go with a mix of mostly dry organic matter....various sizes, shapes, materials.
Adding a bit at time so you don't end up with a mucky mess, but aim deep might need boards at run wall bottoms to hold it in.
It will help break down the poops, absorb water, and d@mn near eliminate odors.....
.......and provide habitat for organisms to continue the ingestion of poops, the larger of which the chooks will enjoy digging for and eating.
This is an excellent example of what I mean, this shows it in a coop, but works just as well in a run:
Here's a great description of contents and how to manage organic 'bedding' in a run or coop...and there's a great video of what it looks like.
https://www.backyardchickens.com/t/1037998/muddy-run-help-please#post_16017992