[SasV7ReJ]

Predators are not "there" for anything....unless you are into some kind of biblical mindset. Ecosystems evolve, with a mix of prey and predators. In undisturbed systems, they balance out. Feral cats are not a part of any New World ecosystem, nor are they parts of any ecosystems outside of areas where their ancestral wild ancestors occurred- Europe, central Asia, and northern Africa. Feral cats are considered among the worst of invasive species in many areas. Now, I am the first person to say that "alien" species do NOT equal "invasive", in and of itself, and in many cases, alien species have fit into new ecosystems harmlessly...just look at European pigeons in US cities. But cats are very destructive. You are in Canada...and feral cats may very well be competing successfully against your native foxes and Mustelids, not to mention lynx and bobcat.