This morning I went to let my duck out and found her sitting on her bum with her legs out, breathing through her mouth and a little nasal discharge. She couldn't seem to stand. I took her straight to the vets and he suspects the above disease. She is on antibiotics. I have added a tonic to her water and am offering it to her regularly but she isn't eating. Can I syringe feed her anything, maybe baby food. Any suggestions would be appreciated.