If you encounter a feral cat colony, the best thing you can do for them is to perform TNR (trap-neuter-return) on the cats. TNR is proven to be the most efficient way of controlling feral cat populations. Never bring feral cats to a shelter since most of them will either turn the cats away or kill them after the required holding period. TNR ensures that the colony will not grow. You can also become the colony’s caretaker providing them with clean food and water. A little online research on your community resources can lead you to help with TNR and possible financial support for the surgeries.
These two websites provide answers to FAQ as well as step-by-step how-to trap feral cat instructions:
http://www.feralcat.com/trapinst.html
http://www.aspca.org/adoption/feral-cats-faq.html
