So we have 4 chickens and I have noticed that our run is starting to smell. I wasn’t sure if there is something that we could do, we don’t have any bedding in it, and I try to pick up the poop sometimes. Is there anything that we could do? Thanks! 
I have included a pic of our run and coop.
also, there was grass in that pic but now it’s just dirt and the chickens are basically double the size now.

I have included a pic of our run and coop.
also, there was grass in that pic but now it’s just dirt and the chickens are basically double the size now.