If it makes you feel any better I had a cat who was hanging out on my stoop for about a week and he VERY friend. Then the weather turned here so I brought him inside to my laundry room (after treating him with Frontline). After having him tested for worms I let him out with the rest of the gang and it is like he has always been a member of the herd. I have been looking for his owner, but no luck yet. Everyone has been teasing me that I am a soft touch and he sure knew what house to come to