2 million brown snakes on Guam originating as stowaways on WWII ships from Australia, Papua New Guinea and the Solomon Islands. They eat native birds and have no natural predators on the island... indeed, they have taken over. (Allegory for human weighing on the earth!)
The "solution" "About 2,000 mice filled with acetaminophen will be dropped in the newest test". As the DoD says "No one's ever attempted anything on this scale". So, hey, what could ever go wrong? (Allegory number 2: unintended consequences of poisons and how animals and toxins will create a line of flight from the intended teleological vectors).