We are not talking about domestic cats, we are talking about feral cats- there is a drastic difference.
Yes, we ARE talking about domestic cats.

Feral cats ARE domestic cats that have been forced by irresponsible pet owners to revert back to a wild state, living outside and fending for themselves.

Feral cat: An untamed domestic cat living in the wild.

Killing domestic cats is not the answer. Better Legislation is!