One of the most overlooked areas for reducing killing in animal control shelters are lost animal reclaim, commonly referred to as Return to Owner. Shifting from a passive to a more proactive approach has allowed shelters to return a large percentage of lost animals to their families, or assist them in finding lost pets before they are brought into the shelter.
A great place to start in developing a program is to understand lost animal behavior which is well documented at the Missing Pet Partnership website.
Kat Albrect, keynote speaker at the 2013 Lost Pet Workshop, shared these handouts and websites with attendees:
Cat Profiling Service (determine where your missing cat may be based on its personality)