I received these two young pullets, not positive about age but hatched in September she thought, because they were being bullied awful by the hens and roosters. During isolation time Tico was sneezing some but Taco was not. Stayed consistent for 2 weeks with no progression for Tico and Taco never started so I let them out. They came from an indoor coop and were caged to keep safe so I was thinking some fresh air might help. Fast forward 2 weeks and she is still sneezing. But no other chicken has started. She looks ok, eats like crazy, no discharge, breathing just fine, no wheezing, growing well and has even started becoming more social during the day. I brought the 2 back inside today for more observation but.....what gives? Please share thoughts. Thank you!