Needed Info on Ivermectin for Ducks. How much and How Fast Does it Work?

[azhenhouse]

I posted this posting on the duck forum.

https://www.backyardchickens.com/t/693258/saxony-duck-gasping-for-air

My question for all you Ivermectin Pour-On users is how much do I use on a Large duck, and how quickly does it work.