https://www.backyardchickens.com/threads/runner-duck-cough-or-hiccups-aspergillosis.1606047/
that's my thread about Poppy
Here's a pic of the Nystatin
I got it from a pet bird store online
The dosage I used was 1 gram in 1 ml water, orally by syringe, 2x a day for 5 days Poppy weighs 3.5 pounds.
Honestly I dont know if the Nystatin helped at all or not, and it made Poppy very thirsty. she was drinking like a fish. It should really have been watered down a lot more but then I would have had to give her a lot of MLs by syringe t make sure she got it all, so thats what I did
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