hi i was checking on my broody bantys last Pm when i noticed that one of the little black hens that was not broody was sneezing i suspected kennel cough maybe but coop is fairly clean. My buddy returned this Am to open coop door and found her dead on her back with feathers picked off her belly. would the broodys pic her to death if she was sick or weak? Anyways I'm going down to the coop this afternoon to clean and disinfect coop, yard, feeder, and waterer with bleach solution and replace bedding with new is there any kind of antibiotic i can put in the water to combat this respiratory illness? Any suggestions will be appreciated TKS Chad