I have a hen who this morning was running around and very happy, and how looks very down and can't even walk. Her feathers are fluffed up and she has a small bit of diarrhea running down her vent feathers. I can't tell whats wrong with her could you please help me diagnose her?!!! If it has any significance she molted only her neck feathers this fall and just started laying eggs recently within a month. Please help!!!