ere in Australia- in the 1880s a big rural industry was growing sugar cane. The canefields became infested with a cane beetle which chewed crops to dust. (It came from o/s too). So the government imported a seriously gross thing called a cane toad. And now, a hundred years on, unwanted immigrants poisoning dogs, even poisoning water bowls. My fur baby has come a whisker close to death twice, so I'd say- imo, unintended consequences SUCK!!