Hello, I have bought some sulfadimethoxine soluble powder for 4 pullets. It says on the package to put the contents into 50 gallons of water. I have a 1 gallon waterer. I did some math and found out that I would put in 0.45 teaspoons per gallon. Would the dosage be less though, because my chickens aren't fully grown? Any help would be much appreciated, thank you.