Joe no the rate does not change just add some more waterers. I use 3 one gallon water containers for all my birds. I put 3 cc in each one and one gallon of water. If your birds finish them then just refill and add 3cc again. Do this for 3 days then repeat in 14 days and you should be fine. When worming do not eat the eggs of any birds being wormed for that month.