I have often warned cat owners before about exposing their feral or roaming pets to the dangers outdoors. I have usually had guard dogs confined on my property and that's what they did, protected my property and the other animals I raised there. My chows would kill any cat caught trespassing. If that sounds cold to you perhaps you will consider the cats were there hunting something to murder themselves.
Years ago, back when a landowner still had property rights, I warned a neighbor about the huge cat he had coming into my back yard with my large Husky out of Alaskan Indian sled dog stock. He laughed and said “No dog alive could hurt that bad cat!” Okay, I’d warned him.
The next time I saw the cat in my yard I let my dog off his chain to protect my property. The cat weighed almost thirty pounds.