Do you think it wise to treat all of them as well?
In your experience does this help if it is E. Coli as well?.....For the corid. I am so confused an what to use. There are so many options. Is it better to use the powder or liquid form? Is there one specifically for chickens or is it the bovine kind and can be used with chickens?
Corid is mild and won't hurt the others if you have them housed together. You can use either liquid or powdered Corid (it's found in the cattle section of Tractor Supply).
Corid is Amprolium which is a Coccidiostat. It acts as a thiamine blocker, basically it starves Coccidia which is a protozoa. It will not treat E. Coli - you would need antibiotics for that - contacting a vet for antibiotics is always best.
Corid dosage is 1 1/2 teaspoons Corid powder per gallon of water or 2 teaspoons of 9.6% Corid liquid per gallon of water. Mix a fresh batch everyday - administer for 5-7days. This solution should be the only source of water available.
For your sick girl, you can direct dose her to get the medication started - if you have the liquid Corid give .1ml per 1pound (undiluted).
If you have the powdered Corid mix 1/2 teaspoon powder with 2 teaspoons water and give 0.34 ml per pound orally daily.
The direct dose can be given once a day for 1-3days - this is in addition to the medicated water.

