I have a 3 year old Salmon Faverolle with one side of her face swollen, eye swollen shut. She is eating and drinking. The left side of her face is normal, comb red. She keeps her mouth open to breathe but her chest is clear and her breathing is not labored. I have her on baytril, have given her vitamin A and nutri-drench. How can you tell the difference in what could be wrong? If she has coryza, I may want to cull. How long to wait? She is isolated.