Safeguard and Corid- what dosage for multiple ducks

[calrock67]

I have four pekin ducks that are all together in an area right now. They do not have feathers yet but are starting to loose their down, turning white and are probably around five weeks old. I do not know which one is pooping diarrhea and blood but want to treat all four for the worms and stuff. What is the most effective way to do this, I have liquid safeguard and corid. Can I put it all in their water container and if I can how do I calculate the dosage? I can't really separate them at this time.

Thanks!!
Caroline

 

[Isaac 0]

@casportpony