If the corid doesn't knock out your cocci you will want to get this:
https://www.jedds.com/shop/trimethoprinsulfa-100-g-medpet/
I'd give it a couple days and see how the corid does. I am currently treating some chicks with the sulfa powder because the corid didn't work for their strain.
There are a few questions I can't answer but;
I have gotten the corid water on my hands before, from spills, I don't believe there is any harm that comes from it. I'd just be sure to wash your hands after.
You can definitely give them scrambled eggs & / or yogurt. I would recommend it. I don't...