I will give a summed up account of what this hen is doing. In November I noticed she was coughing. So I tried a couple of antibiotics. I tried Tylan 50 water soluable and another antibiotic that starts with a "D"....I can't think of the name right now but it says for respiratory ailments. I dewormed all my chickens with safeguard and have been giving them probiotics and on occasion layer boost in their water. Nothing has helped this chicken's "cough". In the meantime, none of the other chickens are displaying any signs of coughing. Ok, so I thought maybe it would be something she would get over especially since she has absolutely NO drainage anywhere and has no signs of illness. She eats, she drinks, she interacts with the others. So again, I thought I would give her a break from any meds and let her be. Well, a couple of days ago I picked her up to pet her and I noticed her lower beak was not closing tight to the top beak. Upon further investigation I noticed she had what looked to me like a mass of yellow that was pushing her tongue to the side. When I open her beak it smells like yeast. So I've been treating this "mass" with women's yeast infection cream by putting it on the mass two times a day. It isn't getting any worse, but it's not really going away. From what I can tell, she doesn't have anything on her throat. So I was wondering if anyone had any idea what this is and any suggestions on how to nip this thing in the butt! Thanks so much for any help!! My camera stinks and trying to hold a chicken's mouth open and take a picture requires talent I don't have.....so I hope this picture will do.