I've just trapped/neutered/returned 3 more cats in the past week with the help of my husband. This makes a grand total of 16 cats in three years that we've trapped and brought to the SPCA for this amazingly free service.
Then I finally dropped a dime (which I was loathe to do, as I live and let live as a general rule) on the opposite neighbor to Animal Control as a cat-hoarder. Result: they found 15 feral cats living in her home, including 6 kittens. I like cats. I don't like digging into cat-shit, or cat the eau-de-piss left in my garden by an army of marking males.
The cats come with their fleas, and some with lice. Once fixed they are a peaceful and docile community to co-exist with, but I also can't stand watching them when they're not healthy. Interestingly, once I start trapping, they won't come into the garden to drink from the fountain. Even though I don't trap in my garden, but on the roof of the building next door. Cats just know. I use jack-mackerel and a tincture of Valerian, which is like kitty-crack, and acts like cat-nip once they sniff it. I pulled this picture off the SPCA site. They tip the ears of the feral cats that are fixed so you can see who in the community is in need of trapping and hopefully keep track of the size and general condition and stability of the population.