Probably about 3 weeks old. I have had her for 2. She has a pen in the yard with a roof so wild birds do not contact. It is in the 80's here and at night she comes in. Tonight she is sneezing with liquid coming out. So far the banty buddy is not doing same. How do I diagnose and then how do I treat? The more I read the more confused I get. Some of what I have read have indicated to me that she could have caught this from her mother. I bought her at a feed store a couple of weeks ago. I had to go to several stores for a couple of weeks cuz all the chicks were sick. I ended up getting a banty for a companion although the guy at the store tried to tell me she was just younger. I have limited space so I can only have the two but I really wanted full size eggs. Also they both now have enlarged right chests at night. At first I just noticed this in the banty at night but in a.m. gone again. Now both of them have it. Is this normal? I never noticed it in the chicks I had before.