User blog comment:Capt. Miller/Things that Piss Me Off/@comment-24087008-20140722165657/@comment-1187559-20140722171146

Cats can be quite good at killing vermin animals like rats and mice, wheras dogs tend to just ravage them. Dogs also have a habit of chasing animals they shouldn't, like swans. Of course you need an active cat for that as some can be quite stereotypically lazy.