Here's the deal. I have a small hen house that sits inside a sizable predator protected run. So I don't lock my hens in their house at night. Because they are safe from anything that would harm them. BUT I can't keep out smaller critters like rats, mice, and small birds. I have sand under the roosting bar inside the house and shavings in their nest boxes. And for the most part the sand stays put as does the shavings. Well, we went away for a few days a few weeks back and the neighbor was looking after my ladies. When I got back, someone had really stirred up the shavings and kicked lots of them into the sand area of the house. My BO has finished molting and is getting ready to lay again and I thought perhaps she was in there and maybe grumpy and kicked some shavings out. Well, it's happening every night. I tidy up the house in the morning and I don't always get home to check on them before they've gone to bed. And each morning the shavings are all fluffed up and kicked around. I see no droppings, chicken or otherwise, in the nests. So I don't think it's a rodent. Wouldn't I see droppings if it was a rodent? I suppose it could be the hens during the day and I'm just not noticing the few times I get home in time to see them in the evenings. What else could do this? I guess I need to make a point of checking on them in the evenings to see what's going on in the house and maybe do a midnight raid out there to see if I catch anything in there. I'm almost scared to do so.