Install dog feeders in areas like Redlands, Florida and the "corridor" of Houston, Tx, where there are many stray dogs & cats

In Istanbul, Turkey, where an estimated 150,000 stray dogs and cats wander the streets, a Turkish company called Pugedon has come up with a way to feed the animals: “Smart Recycling Boxes,” a machine that dispenses food and water in exchange for recycled plastic bottles.
From all accounts people DO bring in plastic bottle to put in these machines. The stray dogs and cats can easily get a meal (and water) from the machine!