#$%^&*AU2011203506A120120216.pdf#####ABSTRACT OF THE DISCLOSURE The present invention provides an animal ectoparasitecontrolling agent containing as an active ingredient a 5 hydrazide compound represented by the formula (1) C1 R3 R , / 1 C1 (1 N R4Y N , R , N 'O CF3 R wherein R3 represents a fluorine atom, a chlorine atom, a bromine atom, a methyl group, an ethyl group or a hydrogen atom, R5 and R6 are the same or different each 10 other and each represents a methyl group or a hydrogen atom, R4 represents a Cl-C6 haloalkyl group, which shows excellent controlling effects on animal ectoparasites.