Hello! One of my hens has been sneezing and sounds congested, with a bit of a watery/somewhat bubbly discharge coming from her eyes. She acts like a normal chicken other than this. When I noticed this on Wednesday I seperated her, and last night I started her on Duramycin 10 diluted in her water. She has been drinking it, and today was her first full day. No changes yet. Should I use the duramycin 10 on the rest of the flock? Even If they don't already show symptoms? Should I be providing an alternative source of water without the antibiotics? Thanks in advance!