I'm thinking of doing a few inches of pea gravel in my run, with a drain that goes out into a dry creek/messy garden area (we never touch this space and it's a good distance from the coop- about 25ft). My dream is to spray it weekly so the poops disintegrate and drain out. Right now, my ladies have just hard clay and after 3 winters, they hate it and so do I (I live in the PNW so it gets REAL wet). My concern is mainly their comfort. Will pea gravel be okay? They live in the coop now so I'm also concerned about them being able to scratch around. I'd like to avoid sand since it requires removal and replacement, I'm looking for as easy/lazy as possible. Thanks!