I have a one year old hen that hasn't laid an egg in a little over a week. She is just sitting on the nest as if she is broody, but her crop feels slightly bloated and soft. I thought it was sour crop but when I try to drain it by pointing her head down and pushing the crop, nothing comes out. Her comb is kind of shriveled and darker colored where the other hens' combs are bright red and stand up. She is a little lethargic but will get up to eat and drink occasionally and when she does she acts as the other chickens do, but then goes right back to the nest. She also has loose stool or diarrhea. Her vent, eyes, nose, throat and breathing all seem clear and normal. No sign of pests or worms in the poop. Do I treat her with yogurt and ACV? I have started to put ACV in their drinking water. What do you think? Is she broody and sick or just one or the other?