I have 10 pullets that I just moved from a brooder to an outdoor pen. All are fully feathered. Yesterday I noted one of my Easte Egger pullets eyes where swollen, she was off balance, open mouth breathing, and wha appeared to be a runny nose. I immediately pulled her from the others. I have attached a picture of what she looked like. I euthanized her for fear of respiratory disease on the recommendation of a friend who has raised chickens for many years. Then I noticed another pullet with one eye with drainage and again a possible runny nose. I pulled her and put her in a pen by herself. I out Tylan in her water and she seems to be doing better. Then tonight I noticed another pullet open mouth breathing, but no eyes matting. I left her with the others for now because I have no where else to put her separately from the others. I gave her a 1/2cc of Tylan 50 IM. Input a heat lamp on them tonight. Anything else I should be doing to treat them? These pullets are approximately 6 weeks old. I have out Tylan powder in their water and a tsp of bleach. All the others seem to be doing ok right now. Any other suggestions? Thanks you in advance for your help!