One bad apple....
I've been caring for a very small group of ferals (3-4 cats max). In the past 2 days, a very aggressive newcomer has started coming by at feeding time. I'm not convinced he's feral -- he doesn't shy away from me when I come outside and he has an awful lot of weight on him for a city feral in the dead of winter. He also never seems interested in the food, just the other cats.
The problem is he's attacking the other cats. Not in a playful way -- in a howling, hissing, stalking, claws-in-the-hindquarters-to-drag-them-down way. He's attacked one older cat and chased off at full tilt my youngest kitten. I've chased him off both times but that results in all the cats scattering in a chaotic panic and no one came back until the next day. It was 2 deg F last night, and I don't want my "normal" group frightened away from their food, water, and warm shelters in this terrible weather.
How do I get rid of the one bad apple (who I'm pretty sure is someone's pet or a runaway) without scaring off everyone??