I noticed this morning that our pullet/hen was looking a bit lethargic, standing up but not opening her eyes. She perked up for scratch but kept closing her eyes. This afternoon, she seems more lethargic, is still standing up, but still not really opening her eyes. She will for a second or 2 then closes them, turns her head into her shoulder (but it's not stuck that way) and goes to sleep like you'd see them on the roost at night. Her comb is a bit more pale, but not terribly. I don't see worms in the stool, her abdomen feels normal. What could this be? If I can treat at home I'd really love to as we don't really have the money to take her to the vet, but if I have to I will. Any ideas?