We have also had cats dumped on us, that we cared for and now care for the offspring of, but never chickens. How close are you to the city? Country folk don't normally do stuff like that. (I'm 37 miles from downtown Houston.) That is how we obtained our Buff Orpington rooster, Colonel, though. A coworker of my wife had neighbors with chickens. One young roo escaped and would roost on her barbeque grill. She grabbed it and put it back in the neighbors yard. Next day it was back on the BBQ grill. (Deathwish?) She tried once more and it came back, so my wife took it from her this time and he has been a wonderful addition to our flock even though originally we didn't want a rooster. (We had 14 hens) Now we have a few of his little offspring running around too and our flock is up to 20.