I left town for a weekend and it rained the entire time. My kids were watching our animals and I came home to sick/dying chickens. They got sick from wet food, muddy water, and cold wet conditions in general. I lost 3 of 23 chickens within 24 hours of being home. I called the vet and they were put on sulfadimethoxine for 5 days.The rest survived and are looking good and acting normal again. I have not gotten more than 2 eggs since. Is there any hope for my girls? How long should I wait to find out? Is there anything else I can do to help them recover?