I noticed that one answered the question about vitamin water that you asked....
The answer is yes, you need to remove that from them.
Corid works by disrupting the ability of the coccidia bacteria to metabolize thiamine, which is a b vitamin. So
do not give them any vitamins/probiotics while treating with Corid.
Also the Corid-dosed water needs to be the only water the flock has access to— no streams, puddles, other waterers, etc.
That might mean that you need to confine them temporarily during treatment. This is very important to be sure that they are consuming enough Corid to do any good.
Make sure you are mixing the Corid at the right concentration... there’s been a lot of instances lately of people not having the right directions for how much to use, and ending up underdosing their birds as a result..... You need to mix—
- 2 teaspoons (10 ml) per gallon of water if using the liquid, OR
- 1.5 teaspoons (7.5 ml) of the powder per gallon.
Mix it up fresh
every day, and continue for 5-7 days at that dose, then at half-strength for another 5-7 days.
It’s a very safe, you really can’t OD them.... you’d have to be giving it practically straight [well, not exactly straight... but you have to give them
a lot, much more than you’d think....].
There’s instructions for how to make a more concentrated solution to give via dropper directly to the beak of the sickest bird(s).... I’m sure someone can give you that info if you want it....{
@casportpony ,
@Eggcessive .... or if not either of you maybe you’ll know who to tag in.... I’m still learning names

}
Just for the sake of completeness because I don’t remember you saying—
- Did you have a vet run a fecal to check for worms or parasites? (most vets, even ones that don’t see chickens, can run a fecal— but you usually have to ask them to include coccidia, idk why)
- Have you checked your flock for mites/fleas/lice/etc.?
Good luck... I hope your hen starts getting better soon.