She's been on every medicine known to me - she's been to the vet (farm, not avian) and he's cleaned and flushed her eyes. She's a silkie hen - no other chickens are ill. She gets sinus gunk, really hard nasty stuff that comes up from her sinus and roof of her mouth into her eyes. She's blind in one eye from it I'm sure. It's so gross and I am ready to have her put down. Does anyone have any ideas what on earth it might be? It's a yellowish hard gunk - it seems like it just keep growing so it ends up in the poor things eyes and she cant see and it's impossible to keep it cleaned out all the time. I don't think it's CRD. All other birds are fine. This has been ongoing for a long while. My flock has had mareks but all have been vaccinated and I don't think it's that. Nothing I've found online matches. the only way to describe it is I've had similar things in my tonsil area that kind of pop out every once in a blue moon. It's gross. This is my last shot before I take her to put her down, she's a sweet bird and I hate to do it but I can't have her living like this any longer. thank you!