Don't ever leave your pet, or "set him free", in some public park.They'll die a horrible death. Cats survive longer, just briefly, when abandoned in parks. Unlike dogs, who die shortly after their owners dump them there. Cats have enough survival instinct to know they have to find a food source still. Usually some human benefactor like that. But they still eventually die of cold, starvation or disease. And they are having litter after litter of other cats by then. So, you want to abandon your pet in a park because you don't want some shelter to put them to sleep? Well, would rather have what I just describe happen instead?