Quote: It's always important for me to hear other possible symptoms that Marek's causes. I have to say that I had a 3 year old hen who I treated for a broken leg, and she deteriorated for a week and I culled her. It seemed so fast. But I think she was wasting for a few months and I didn't notice.
Grazie, did you ever think of dehydration or heat stress? Sometimes the little buggers forget to drink enough. That can also have symptoms like that.
As for runny poos, with the heat, they drink more, and can produce runny poos. Most of mine do it all summer. I start to think something's wrong if there are other symptoms they may have. But runny poop by itself could just be from drinking a lot of water.