I've had this happen to a cockerel or two also, but usually it's pullets. This is what's happening: One at a time, my chickens will become lethargic. They are between 1 and 4 months old when this happens. By adulthood, none of them get sick. Their comb and wattles are the least developed out of my flock, and they are pale in color. After the initial stage of lethargy, they lose their appetite and start having problems walking. They will just sit in place and close their eyes for long periods of time. They are quiet, but don't seem to be gasping for air or have a big respiratory issue. Usually this is accompanied by diarrhea, but not always. The diarrhea is brown, sometimes yellowish white and bubbly. Their eyes look normal. I can't see any lesions on them. They look completely normal except for the combs and the fact that they are obviously sick. Within a day or two, they are dead. Then another may start up. No two birds are sick at one time. Can you help me figure out what this is please? I have looked on several poultry disease sites and nothing seems to fit well. Has this happened to anyone else?
