Speaking as a feral cat rescuer, cats are trapped, rendered unable to breed with any kittens removed and placed in homes. Colonies are allowed to live out their nature existence with volunteers feeding them one meal per day. Feral Cat colonies make a huge dent in local rodent populations which in turn protect human property. 99% of the feral cats I have come across have been a family pet at some point and were unlucky enough to get a psychopath for a pet owner.
My hope is that the hog population comes to Eastern Canada fast and big. Enough to force theses suburbanites to demand longer hunts closer to their precious plastic ponds and groomed lawns, then we can have some meat hunting in the summer and late winter and finally a lot less whining noise about guns going boom, boom.