Hello. I am a new chicken farmer. I incubated and hatched my own chicks. I was feeding them fermented chick starter which was recommended by my brother. They were 7 days old and healthy when I bought 3 more from a hatchery. The guy at the store said I should give them medicated started since these chicks had been exposed to more germs. So I bought the medicated chick starter and fermented it just like I was doing before. However, now one of the chicks has sticky green foul-smelling poo. It is very different from the other normal bird poo which is more formed, whitish and doesn't smell bad. Now I am confused. Is the bird sick because it really did get coccidiosis or some other bug? Or is it sick because I started giving it medicated feed? I don't know if it needs more medicine or less medicine. Like I said, they were totally fine until I picked up the birds from the commercial hatchery and the medicated feed.