Started about a week or so ago. Just seemed to have a dry sneeze and would act sleepy. I had put some new PDZ in the run (they were closed in the coop when I did it) and changed bedding in the coop (they were shut in the run when I did it) so I thought maybe the dust from these things had bothered them but I cannot remember if they were doing it before or after that. I had also switched food about 3 weeks ago and had to rearrange the roosts and lower them due to injuries. So I definitely brought on some stressers for them. But this girl is slowly getting worse. She is drinking very well, and I saw her eating this am. I have added eletrolytes/vitamins to her water. I did not see her eat tonight and she seemed really sleepy. She didn't even try to move when I went to catch her. Since I didn't see her eat tonight I gave her a dose of pultry nutri drench. She is now separated from the others so she can just rest. But she was still following the others around. Just would sit down and go to sleep whenever they stopped. I did hear another one have the dry sneeze but I cannot figure out which one it is. And the rest are acting great, no issues (4 others). I think she has heavier breathing but no nasal or eye discharge. Can't hear her breathing so I don't think she is congested. Just not sure how to treat. Was already at the vet this month with another one for a injury so trying to avoid spending more $. Thanks for any suggestions.