I have notice my hen has been puffed up lately (3 to 4 days) and today when I picked her up she threw up clear liquid. I have vitamins that I can mix into water and thought this would be good to do for all my girls. They have not been able to free ranging lately due to the snow. I saw her drinking the water today and was hoping this will help her. Well I just went in to check on her and she is sitting by herself in one of the nesting boxes and when I picked her up again she threw up clear liquid which does smell very bad. Has anybody every have a chicken throw up and what do you suggest I should do to help over this???? My hen is on the older side, not sure how old as I adopted her with 2 others. I'm not sure about the poop since they are being kept in (they do have access to a fenced in area attached to their coup) I have all kinds of poop around. When my girls are being kept in I feed them lettuce and stuff as treats.