They have recently been scatching in some alfalfa they may have some mold but not much. This is the only change in feed. I need advise as to whether I have a feed problem a temp problem or a disease of some kind. With more info, maybe there will be some good answers for you. There are lots of people who check the site who will help if they can.
Housing is on a dirt floor cleaned every other day.
I recieved these chicks from a hatchery in Mo. and they were not vaccinated for Mareck's. The Marek's virus kills more chickens than any other disease. It's so common, you can safely assume your flock is infected, even if your chickens don't show any symptoms. Stress due to crowding, moving, or even the natural process of maturing can weaken a flock's immunity, causing an outbreak of the dormant virus. The virus attacks various parts of a chicken's body, resulting in an array of symptoms - droopy wing, paralyzed leg, head held low, twisted neck, blindness, sudden death.