User blog comment:Arbington/The Next Cycle/@comment-2250460-20120805173059/@comment-899316-20120805192256

But they aren't exactly like varren. I could train a group of Attack Giraffes, and sic them on my enemies, but that doesn't mean that it is advisable, nor as effective as simply using dogs. If more evidence is presented that indicates klixen intelligence, then the one-time use as attack dogs would certainly be a point towards that as well, but it isn't enough to justify putting them on the list. The varren are used as attack dogs all across the galaxy, and so were the rachni, because of their aggression and intelligence. The klixen appear to have been used by a krogan madman as attack dogs, one time, and they weren't terribly good at keeping Shepard out. Unless more evidence is presented, I'm reluctant to put klixen on the list.