helping the strays and abandoned

my wife discovered that we can slide a food and water tray under the gate to the backyard of the empty house.  We saw a third cat there, that we had seen before at our feeder.  The owner is still not home.

My wife discovered a house where at least two of the strays in our neighborhood hang out.  The house looks abandoned, because the owner isn’t home most of the time.  The yard is over grown. There is a ledge along the house that provides a safe perch for the cats.  It keeps them off the ground, away from coyotes.

My wife saw two cats there, which occasionally stop by the feeding station we have set up at our house.  One is a tortoise shell and the other is a beautiful, long hair orange male.

We left some food for them and were surprised to discover, that after a few hours, the food was barely touched.  Is someone else in the neighborhood feeding them?