i was watching one of my chickens this morning and he was scratching at the waterer, and eating the mud that the splashes of water made. then he started drinking some water, dribbling it out and then eating that mud. (this would explain why their water always gets so much dirt in it, and the depression all around the waterer.) is this just a natural way of getting grit, or is this a sign that i need to give them grit? (i've read that free-range chickens don't need grit given to them) i've seen my chickens eat little pieces of seashell (i live in FL, they're in the dirt) and stuff, so i know they're getting some gritty stuff. any help on this one?