A compound of Formula wherein X is -O- and W is -CH 2 -; R 1a, R 1b, and R 1c are each independently hydrogen, halo, or C 1 -C 6 haloalkyl; R 3 is C 1 -C 6 haloalkyl; R 4 is -C R 5; R 5 is C 1 -C 6 alkyl, C 0 -C 6 alkylC 3 -C 6 Cycloalkyl, C 0 -C 6 alkylheteroaryl, or C 0 -C 6 alkylheterocycle; wherein each of R 5 C 1 -C 6 alkyl or C 0 -C 6 alkylC 3 -C 6 cycloalkyl moiety can be optionally and independently substituted by at least one substituent selected from cyano, halo, hydroxyl, oxo, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 haloalkyl, C 1 -C 6 alkyl, hydroxylC 1 -C 6 alkyl-, -S p R c, -SH, -S p NR a R b, -NR a R b, -NR a C R b, -SC R, -SCN, or -C NR a R b; and wherein each of R 5 C 0 -C 6 alkylheteroaryl or C 0 -C 6 alkylheterocycle moiety can be further optionally substituted with at least one substituent selected from cyano, halo, oxo, =S, =NR 7, hydroxyl, C 1 -C 6 alkoxy, C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, hydroxylC 1 -C 6 alkyl-, -SH, -S p R, and C 1 -C 6 haloalkoxy; R 7 is hydrogen, C 1 -C 6 alkyl, hydroxyl, cyano, nitro, -S p R c, or C 1 -C 6 alkoxy; R is C 1 -C 6 alkyl or C 3 -C 6 cycloalkyl optionally substituted with at least one halo substituent; R a is hydrogen, C 1 -C 6 alkyl, or C 0 -C 3 alkylC 3 -C 6 cycloalkyl; wherein the alkyl and alkylcycloalkyl is optionally substituted by cyano or at least one halo substituent; R b is hydrogen, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 0 -C 3 alkylphenyl, C 0 -C 3 alkylheteroaryl, or C 0 -C 3 alkylheterocycle, each optionally substituted, where chemically possible, with at least one substituent selected from hydroxyl, cyano, halo, or -S p R; R c is C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 1 -C 6 haloalkylC 3 -C 6 cycloalkyl, C 0 -C 3 alkylC 3 -C 6 cycloalkyl, C 0 -C 3 alkylphenyl, C 0 -C 3 alkylheteroaryl, or C 0 -C 3 alkylheterocycle each optionally substituted with at least one substituent selected from cyano, halo, hydroxyl, oxo, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 haloalkyl, -S p R, -SH, -S p NR a R b, -NR a R b, - NR a C R b, -SC R, -SCN, or -C NR a R b; p is the integer 0, 1, or 2; and n is the integer 0; stereoisomers thereof, and veterinarily acceptable salts thereof. X is -O- and W is -CH 2 -; R 1a, R 1b, and R 1c are each independently hydrogen, halo, or C 1 -C 6 haloalkyl; R 3 is C 1 -C 6 haloalkyl; R 4 is -C R 5; R 5 is C 1 -C 6 alkyl, C 0 -C 6 alkylC 3 -C 6 Cycloalkyl, C 0 -C 6 alkylheteroaryl, or C 0 -C 6 alkylheterocycle; wherein each of R 5 C 1 -C 6 alkyl or C 0 -C 6 alkylC 3 -C 6 cycloalkyl moiety can be optionally and independently substituted by at least one substituent selected from cyano, halo, hydroxyl, oxo, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 haloalkyl, C 1 -C 6 alkyl, hydroxylC 1 -C 6 alkyl-, -S p R c, -SH, -S p NR a R b, -NR a R b, -NR a C R b, -SC R, -SCN, or -C NR a R b; and wherein each of R 5 C 0 -C 6 alkylheteroaryl or C 0 -C 6 alkylheterocycle moiety can be further optionally substituted with at least one substituent selected from cyano, halo, oxo, =S, =NR 7, hydroxyl, C 1 -C 6 alkoxy, C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, hydroxylC 1 -C 6 alkyl-, -SH, -S p R, and C 1 -C 6 haloalkoxy; R 7 is hydrogen, C 1 -C 6 alkyl, hydroxyl, cyano, nitro, -S p R c, or C 1 -C 6 alkoxy; R is C 1 -C 6 alkyl or C 3 -C 6 cycloalkyl optionally substituted with at least one halo substituent; R a is hydrogen, C 1 -C 6 alkyl, or C 0 -C 3 alkylC 3 -C 6 cycloalkyl; wherein the alkyl and alkylcycloalkyl is optionally substituted by cyano or at least one halo substituent; R b is hydrogen, C 1 -C 6 alkyl, C 3 -C 6 cycloalkyl, C 0 -C 3 alkylphenyl, C 0 -C 3 alkylheteroaryl, or C 0 -C 3 alkylheterocycle, each optionally substituted, where chemically possible, with at least one substituent selected from hydroxyl, cyano, halo, or -S p R; R c is C 1 -C 6 alkyl, C 1 -C 6 haloalkyl, C 1 -C 6 haloalkylC 3 -C 6 cycloalkyl, C 0 -C 3 alkylC 3 -C 6 cycloalkyl, C 0 -C 3 alkylphenyl, C 0 -C 3 alkylheteroaryl, or C 0 -C 3 alkylheterocycle each optionally substituted with at least one substituent selected from cyano, halo, hydroxyl, oxo, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 haloalkyl, -S p R, -SH, -S p NR a R b, -NR a R b, - NR a C R b, -SC R, -SCN, or -C NR a R b; p is the integer 0, 1, or 2; and n is the integer 0;