The invention recites spirocyclic derivatives of Formula (V.1) or (V.2), stereoisomers thereof, veterinary acceptable salts thereof, compositions thereof, processes for making, and their use as a parasiticide for an animal. The variables A, B, V, Z, Y, W1, W2, W3, R1a, R1b, R1c, R2, R3, R4, n, ad “ - - -” are as described herein.