Hi Everyone, I'm new to the chicken world and have a depressed,lethargic Young hen. None of my chickens have started laying, yet. They're between 4-5 months old and my barred rock seems to be sick. She has bad Balance, shes slow, has runny poop,a swollen chest, sleepy, and not wanting to stay with the flock. I have noticed a lot of poop that is bright green if that helps? They have electrolytes in the water and I've noticed it has helped a little. Please, help!!!!!