Silkie, right under a year old, previously healthy, but she's always been at the bottom of the pecking order. When I noticed her sneezing (about 4 days ago) I put Sulmet in the communal waterer. It hasn't helped, and today, I noticed she has watery eyes. She keeps sneezing and shaking her head... Nobody else is showing any syptoms, but I now have her separated. I've stopped the sulmet, and have electrolytes in her water now. Anything else I can do? How to proceed? Thanks!