Originally Posted by Janee

Big Cat: There is a difference between feeding a wild animal (birds/squirrels etc etc) or even a semi feral cat and feeding a cat that is obviously owned and looked after.

The OP must have pangs of conscience that s/he is encouraging the cat to stay by feeding and letting it in and has asked advice. The sensible thing to do is discuss with the owner.

You can't care very much about your outdoor cats if you actively don't give a d+++n where they are spending their time and why the cat doesn't come when called or spends long periods away from home. Most owners would want to know and care.

On another cat forum there is this thread but from the owner's viewpoint:

the Cat Chat Feline Forum: Someone trying to take my cat.

You have to scroll to the bottom and read up.