One tube is enough to treat 1250 one pound chickens at .2mg/kg which is the dose that's most commonly used in *all* animals. I'm no expert, but clearly they got too much. None of the others are sick, right? So I doubt that's what killed her.i had a very hard time trying to give them any. i have 75. so i mixed 3/4th of the tube in some wet feed and poured it in a line in the coop.it seemed as if they all ate equal.
-Kathy