Any advice for Coccidiosis

[Feather babies]

With them already very sick you are far better off getting some tolturazil. I believe it's easier for Canadians to get online (?). But your vet could certainly prescribe it.

When they are already very sick they can go downhill fast. One thing I learned the hard way is that when they sit with their feathers all puffed out, it's because they're cold. The illness makes it hard for them to regulate their body temperature.
Helping them with a heat light (and plenty of room to get away to cooler spots) saved some of mine when I learned that trick.
In summer, that makes it hard for you to offer... but it could still be done. Just remember they can overheat very easily so they need really good options for getting distance. And it depends what your outdoor temperature is. It's pretty time intensive to manage the temp of fully feathered birds, but if done well - hopefully with helpers, it could buy them an extra day or two while you get your hands on the meds to treat.
Make sugar water available very close by, and keep the water cleaned and changed at least once a day.
I also thought it helped when I offered a sweet flock-block style treat meant for chicks, it was a small cake but had molasses, ground corn, seeds, and worms in it. Something so tempting they would keep trying to eat it even when they didn't feel well. Also some egg yolk, but it doesn't become more tempting for sitting out, so if they didn't take it fairly quickly I would dispose of it and try again later. The purpose was not good nutrition but just getting enough calories in to keep them alive.

Herbs / DE / Vitamins won't be any help.

Thank you for the good information, I found a place I can get the medication on Monday so I'm hoping they can stay strong another couple days

 

[Feather babies]

As mentioned above, the medicated feed has corid in it but the B vitamins you’re adding are negating it. Corid (amprolium) works by blocking the absorption of thiamine (a b vitamin) which starves the cocci. So quit all the extra things and just feed them their medicated feed and you should see an improvement.

 

[Feather babies]

Only gave vitamins yesterday but none since. Thank you