I need some direction, I had 19 meaties and lost a couple to something that looked violent they were on there backs with there feet in the air. Since then I have lost a bird every couple of days. I noticed that they get very lethargic and don't seem interested in food they also have very red skin all the others have pink skin. They will just lay very still breathing shallow for hours then they die. I house them in a barn with fresh air and plenty of room to roam around. Started off feeding them unmedicated chick feed and then switched them to standard meatbird feed. They get food for 12 hours then it is taken away for 12 hours. We were hoping for organic chicken but would be willing to give antibiotics if that is what is necessary. We do not want to lose the entire flock. They are approximately one month old.