Alley Cat Allies, is the US nonprofit clearinghouse for information on feral and stray cats. For more than twenty years Alley Cat Allies has advocated Trap Neuter Return – the most humane and effective method to reduce feral cat populations. I have unashamedly yoinked a lot of their information for our TNR Manual and translated it for an Irish audience. Their site is packed with information for anyone interested in TNR. My gurus.