This week I had her sinus cavities and nasal area scoped on both sides, xrays of her head, attempts of slides made to see what might be growing or going on and we flushed out her sinus cavities. She was put on antibiotics. So far nothing that would explain the discharge has been found even though my wallet is smaller During the three hrs we spent at the vets this weekend, we didnt see one iota of "snot" anywhere we looked. Of course it was back when we returned to the barn and I have gotten a sample to the vet.
She is a 6yr old OTTB, outside more then in, and does not seem to have any exercise intolerance. She has had the discharge at two different barns. No coughing or other symptoms.
Thanks for any insight.