Pets that have become feral are suffering from mange, worms and who knows what all. The females are deformed from too many litters. Cats do a lot of damage to the environment from the urine to killing of massive amounts of wild animals. They are invasive. I had cats and they were not allowed outside. They were happy and well adjusted. They also lived to be 19 and 20 years each. They were spayed. I often wondered about the litter though. I tried to use clumping litter that according to the package was good for the environment. I buried it on my own property. But I had scat from feral and owned dogs and cats in my yard as well as dogs pissing on my tires. I smacked a neighbors dog with a shovel that was being aggressive and not letting me on my own porch. To me owned and feral are a lot alike in that a lot of people don't take care of their pets. When it's crapping in my driveway I don't care if it is owned or feral. Feral cats were some ones pet at one time. How did they become feral?