[–] littul_kitton ago
Engineer the pet rats to need a particular chemical, then put that chemical in rat chow. They escape and then die of a nutrient deficiency.
[–] PepeFarmRemembers ago
Sounds like a smaller version of the great Emu war. tldnr: The Emu's won.
[–] throughtheblack ago
Alberta, Canada did it! Although they were eradicated before they could get too much of a foothold anyway.