Brown nasal discharge, one side only?
My horse has a brown discharge in his left nostril only. It has no odor. When it dries, it is a tad "gelatinous" looking and crusty. When I wipe it with a paper towel, it's brown with a tinge of blood. I checked his nostril for signs of a bite or abrasion and cannot see anything. After I wipe it, it comes out clear for a bit (like normal...just a tiny bit) but when I visit again hours later, the brown "crust" is there. No fever or discomfort and he acts completely normal, eating well. He and another horse play bit ALOT so my first though was that he got bit in the nostril.
Are the other possibilities sinus or tooth issue? He is due to have his teeth done so I guess I'll get that scheduled asap. Dentist is also a vet. Thanks!