My EE hen has been acting very lethargic the last few days. Laying on the hill, or near the hay bale on the side of the house, or going up on the roost. Just not her usual perky self. Not hanging with the rest of the hens either. She's eating some, though not interested in things like scratch or feed. Drinking water well. I gave her some plain yogurt just now and she gobbled it up. Overall, she appears healthy except that I noticed a bit of poop in her feathers right near her bum (not a lot, just a few bits), and there was a really nasty, kind of stringy poop under the roost this morning on the floor of the coop. Her tail is also hanging down and it is usually raised high. Her diet is laying feed, scratch & other treats including yogurt and fruits/veggies plus she free ranges with the others. Plenty of fresh water. I'm concerned primarily because I can't get her to a vet until Monday, and she's our favorite chicken. It's 4:30 and she's up on the roost with her tail down right now looking kind of pathetic. She laid an egg yesterday and the day before, not today though as an EE, I don't expect one every day. I haven't noticed worms in the poop in the coop though I'm not sure that I would (do worms stay in it when it is excreted?). Any thoughts on what this might be? Should I be worried?