I have a 21 week old GLW hen, not laying yet. Her Comb looks a little less developed compared to her sisters. The past month I've noticed almost liquid yellow diarrhea in the run and finally figured out who it was. She has no other health problems. Her vent looks fine. She is just as active as everyone else. They always have a little apple cider vinegar in their water. I tried a molasses flush on her but there was no change. I hate to just give her antibiotics with out knowing the cause. Could it be worms? I haven't seen any in the poop but that doesn't mean they're not there... No one else in the tractor has anything wrong with them, all other poops are normal. Thanks!