Thanks for clearing that up, I wasn't sure the 100% correct quantity per gallon and I'm so happy that you helped correct my post. Also I said Corid because I thought coccidiosis was a slight possibility and something to consider. But now I'm almost sure it's either skin hitting itself or a respatory/allergy infection.I would not treat with Corid. It's not an antibiotic, it is not an antihistamine or allergy medication, it's a Coccidiostat and will not treat anything but Coccidiosis (overload of Coccidia).
Not sure what a controlled quantity means? There's correct dosing and then there's guesses?
The amount you have posted is not correct. I will give you the correct dosing so that folks who read this in the future will hopefully get the dosing correct.
Liquid Corid dose is 2tsp or Powdered Corid Dose is 1 1/2tsp per gallon of water given for 5-7 days as the only source of drinking water.