Hi, we have Safeguard fo worm our nine girls. Yesterday we tried to give it to them in bread, only three took it, six wouldn’t even look at the bread. Today planning on putting it in the waterer. Do we adjust the 3cc per gallon dose for the number of chickens? So, I was giving 1/2cc per hen, should I put 4.5cc in a gallon and a half of water? Thanks!