I am adding a new hen to my flock. I am currently keeping her in a cage seperate from the rest so as to introduce her to the flock slowly and with the least amount of stress to all. I have noticed that she has a sneeze / sniffle with just a bit of clear drainage from her nose. She will sneeze and swallow. Other than that she eats and drinks well and is as active as she can be in a cage, preening etc. Is this cause for major concern? I have thought maybe some Terramycin to clear it up. Any suggestions?