So I have been treating my flock with yogurt and cod liver oil for a few weeks to try and fight off the sneezes without medicating. I really don't wanna medicate if I don't have to. There are no other symptoms really. Just sneezing and a few shakes of the head from time to time. This is primarily occuring in the same one rooster but the second rooster does it every once in a while and I've heard a hen do it like once. What in the world do yall think this is and what should I do?