I have a golden cuckoo Marans rooster, 1 year old. Wednesday he was perfectly normal, -energetic, vigorous eating, drinking, mating. Thursday morning he was extremely lethargic. He walked to the feeder and fell sound asleep. His comb appeared brilliant red. He had solid and normal-looking droppings, but very bright green. The birds have been out ranging, so the color may not be a sign of disease, but the hens do not have droppings of this color. All day Thursday, the rooster alternated between very brief periods of standing/walking and longer periods of laying absolutely flat, head on the ground, eyes closed. I was not home, but DH said many times he thought he had died and checked for breathing. He syringe fed some water. I had planned to cage him when I got home late Thursday, but when I went to check on him, the rooster showed a sudden improvement. He ate and drank on his own and mated the hens, although he went to roost early. Today, Friday morning, he needed some blue-kote on his foot. The hens pick at the feathers on his feet and caused some bleeding. He was able to crow (not something he could do yesterday) but kept falling asleep. He slept a lot all day, but did not lay as flat or appear dead, which I guess is a slight improvement. I don't know if he ate much as I was working, but he did pick at feed this evening. During the brief periods that he is awake, he is capable of running full speed after a hen and seems somewhat normal, but he quickly falls asleep again. This came on very suddenly, -overnight. He's never been wormed before, and I have some Valbazen. I don't know if worming is hard on their system and I should wait for improvement, or if I should worm right away (or at all). It almost seems like he ate something bad or had a heart attack (would he survive that?). Not a gradual decline at all. I'm not sure how I should proceed, but something must be wrong with him. I appreciate any insight someone might have.