If the animal is here and it’s not welcome then it gets taken care of.
Leaving them alone means they get killed or eaten alive by hawks, eagles, coyotes, wolves, moutain lions, bears, wolverines, bobcats, or etc.
It sounds cold but what to me is truly cold are the monsters who drop off their house pets along US 20.
Please take them all to a shelter or rescue instead of playing God yourself....at least they might have a chance at a rescue.