we have 4 chickens and this is our first winter with them. all seem bright and energetic, shiny feathers, eating/drinking well but 2 have been sneezing a bit. I have been giving them oatmeal with kefir (all we had was blueberry) which they like. Should I just monitor or is there something I ought to try, to head off a problem? I'd rather not wait for them to get sick.... It is cold/snowy here but the henhouse is dry/ventilated/pretty draft free and I replaced the pine shavings yesterday to clear out old poo and feathers from the one who is moulting. They spend a few hours outside as well-we shoveled enough space for them to find some grass and run around outside their pen.