Hello, I'm wondering if anyone has had any experience with similar symptoms in their chickens. My rooster has been throwing up mucus/head shaking once or twice daily. The mucus is clear (no blood) In addition, some of my hens are shaking their heads, as well, with the occasional sneeze. I've taken my birds to an avian veterinarian, who prescribed Tylan (via oral syringe) for 5 days (which showed some improvement) and then another 5 days. While there has been some mild improvement in their symptoms, they really haven't responded as strongly as I would like to the antibiotics. They tested negative for mycoplasma in a test taken by the vet. They are still highly active, eating and drinking well. So far, the hens laying has not changed in any way. I'm wondering if anyone might have had a similar experience? If so, what treatment would you recommend? I'm at a bit of a loss here and thought I would reach out before spending more hundreds at the vet. I've ordered VetRx from Amazon, which arrives this week. I would love any suggestions for treatment (besides culling). I would like to do my best to help them! I will be keeping a closed flock FYI. Thanks so much!