Don’t use the SafeGuard pellets, since dosage would be hard to calculate exactly. Use the SafeGuard Liquid Goat Wormer or the horse paste if using SafeGuard. It is 10% fenbendazole and the dosage is easy—0.25 ml (1/4ml) per pound of weight given one and again in 10 days for roundworms only. Use it for 5 comsecutive days to treat more serious worms such as capillary or gapeworms. But while molting, they really should get the Valbazen instead. Valbazen is very expensive, around $48, but if you shake it well for each dose, and store it out of the heat and cold, it will provide 1000 doses, lasting years. You can share it with other chicken owners as I have.