Hey sorry it doesn’t look like anyone got back to you. How is she doing now?
I came across your post as I have a chick who I think has a slight rasp sound when she breathes sometimes. She seemed poorly this afternoon but has perked up a bit - but still opens her beak sometimes - usually after eating or drinking. We wondered if she had something stuck or an infection maybe.
Do you think your hen’s trouble could be related to the peepers? I think you’ve done the right think to try and treat potential infection. I would do the same thing, but not sure what to use, or what dose, especially for a 2.5 week old chick.
Hope Gwyneth gets better...