If ANY of the cats you kill are someone's pet, you should die a painful death. That would be like killing their child. Many pets are child -substitutes.
Poster Comment:
Three stunningly retarded comments in a row! Yup, still a retard.
I would never kill the pet of a responsible owner. I have, and will again if necessary, killed dogs running my cows. After two or three requests to keep them out of my pasture, I realized the owners didn't care what I wanted. So their dogs died.