Some one please help, I left this weekend and got back todays and one of my chickens is devolping a wierd black line on the crow and is weezing and sneezing. I cleaned the coop imediately because it was fairly wet. I'm really worried, I think she could be sick. They do have probiotics in their water, she is 29 weeks and we just started recieving eggs acouple days ago, I don't know if it was from her though. She is a Buff Orpington. Any thoughts on what this might be? Is it serious? What should I do?