Essentially it is 2 teaspoons of the corid liquid in a gallon of water. The sick chick can be given a couple of drops of the concentrated solution direct into it's mouth to ensure it starts working, but if it is spewing up fluid then that suggests there is a blockage somewhere and giving it Corid may not help at all until you get it unblocked.
What does it's crop feel like? Does fluid come out of it's mouth when you massage it's crop? You may need to try to empty some of the fluid out of the crop and then start massaging it to try to break up the contents.
What does it's crop feel like? Does fluid come out of it's mouth when you massage it's crop? You may need to try to empty some of the fluid out of the crop and then start massaging it to try to break up the contents.