Your mother and I have noticed a few months back that there were several stray cats near our home; our neighbour had adopted a couple of dogs and do put food out for the others, so we have decided to do the same, but for cats.
We have lost count on how many cats have been using our open kitchen, definitely at least 4 or 5, and there is something else we did not expect. Birds have also began to increase in number, they usually come in the morning, while the cats come at night :)
We usually go through a bag of food every 8 or 9 days, I’ll say one thing though, they are awfully clean diner, the bowl is usually finger licking clean when it is empty :)