We are new to raising chickens and have a couple questions. We have 4 barred plymouth rocks. We are in Maryland and the temps are in the mid 20's right now. Chicks are just starting to lay and one has very watery poop. Is this something we need to worry about or what can I feed to help her, if it is necessary? Also, one has been shaking her head to the right for about two weeks and coughs once in awhile. What's up with that? Do we need to do anything for it? I am all ears and appreciate any advise you can provide.