The usual dosage of Equimax is 0.03 ml per pound of weight, so about 0.15 ml for a 5 pound hen. 1 ml syringes are available free at most pharmacies for giving these small doses. Dosage for other praziquantel containing medicines are different. Those include Zimectrin Gold horse paste, Drontal, or Droncit.Did you determine amount to give by weight?