At my DH's feed store there are several feral cats, he catches them often and has them neutered or spade, and feeds them and gives them water, but they are so afraid of people they only come out at night, they keep warm in his warehouse in the straw. He puts a huge tub of food out at night and if you wait a while and are quiet you can see them all come running to eat.
They have caught 2 that were pretty tame and his employees have taken them home as pets.