Ok, so I am pretty new to owning chickens and did not know all the biosecurity issues. Saturday, I bought chicks from a local breeder. I bought older chicks to try for females and did not inspect them closely. One chick has a watery eye. She seemed otherwise ok. I separated her from the others and set up a quarantine pen for them. None have been introduced to my flock. I did research on her eye and thought maybe she has Mycoplasma. I contacted the breeder and he said they have not had any issues. All the chickens I saw appeared healthy. I am treating all the chicks with Oxytetracycline. I started on Sunday. Her eye still seems watery and irritated, but not any worse. She had one watery stool today. All other stools appear normal. Her breathing sounds normal and I observed one sneeze yesterday. I would appreciate suggestions and advice on treatment. Thanks.