Hey, so my female duck is 4 months old and for the past month she's been sick. Started off with a slight difficulty in breathing but her condition's getting worse by the day. I find her panting most of the time, her wings always hang down, she has watery eyes and nose and severe diarrhea. she's gone super weak and of course she's eating very less because of all that. I keep her in a clean and cosy environment indoors. I took her to three different vets but none of the antibiotics and injections they've given seem to help so i'm losing all the hope. Does anyone know what might be the problem?