I can confirm this is definitely the case. I tested it at the DM North entrance because I couldn't figure it out. I used Demo Shout on that first critter (rat/roach/snake) and sure enough it ran off to chain aggro the two ogre pack just right of the zone-in. I religiously kill critters in DM now if its a testy spot.

Highly recommend killing these critters for safety also:

- Right after the door you unlock with Fengus's key. This critter will run outside and aggro the Ogre+dogs pack.
- Any critters between the insect pack and the twin reavers near Slip'kik's trap. They will aggro the warlock packs.