Yesterday, my 1 year old chicken started acting very lethargic, she didn't want to come out of the coop. I noticed she was what looked like chewing on air. She was opening and closing her mouth constantly but not gasping for air, only small movemnets. When she tried to drink everything would dribble out again. There was a small, hard clump in her crop this morning (impacted crop probably) but I don't think this is the problem. Her crop doesn't always empty overnight (I think it's slow or a little pendulous) and I will have to treat this. I isolated her with some water but no food. Her stool is very strange, it's a bright yellow colour, quite runny but not foamy. It's been like this since yesterday. She hasn't had normal stool for a long time now though, it's been very watery and runny for at least a month but she was acting fine and I couldn't seem to treat it. I can't get to the vet until Monday, earliest.