Okay so almost all of my six hens have poo stuck to their butts. They have access to a run and are never locked in their coop. I think they just might have eaten some compost that made them have some runny poo. What do I do? Do I need to get it off or will it come off on it's own? Do I need to soak their butts in warm water or use a warm washcloth to get it off?