Here are 2 not so great videos (she thought I was chasing her with meds, so it was difficult to get a proper video), but you can somewhat see how she is breathing. Now that I am looking at her, I think the deep breathing has diminished somewhat, maybe? She's still doing the tail bobbing/deep breathing, but it seemed more pronounced before. Perhaps the anti-biotics are kicking in?
I felt her stomach and it feels doughy. I can also feel her bones quite succinctly, which really concerns me. She was always a well fleshed duck, so she has definitely lost weight.
My husband gave everyone tomatoes, and she ate with gusto. I did notice that her flock mates are chasing her out. I'm going to put her in the duck run, with her welshie sister, even though her welshie sister will hate it.