so i saw worms today in a chickens poo.. ive been trying to stay away from the wormer but i have a big pack of wazine soluble. The directions confuse me thou... It says give 100mg in 50 gallons of water for 2300 chickens. so thats 23mg per chicken.. how do i measure out 23 mg out of a 454 g bag? and the lady at the feed store told me it was fine for laying hens, but on the package it says dont use for laying hens? idk what to do.