I have 10 6 week old chicks..one of them has what I guess is diarrhea. Its all dark brown and looks kinda like runny chocolate pudding. Problem is I dont know what chick and I thought at first it was because of the change from totally feed fed..to let out in the yard. This chick has had it for at least a week and half and it hasnt gotten better. Is there something I can give the chick to stop it? I'll sit there and find the chick. All seem to be eating and none are looking like they are losing weight or resting all the time. I have a feeling it is one of my black australorps. The spots I see arent a lot so it looks like only one chicken is affected. Got any ideas? Would antibiotic help? They sell a bottle at the feed store for scaly leg and other things I can't remember. They are still on the chick starter by the way.