I am afraid I have never heard such rubbish as that wrote by allroundhunter. I have kept horses for years and been on many farms and am also a volunteer of the cats protection league. Most feral cats were domestics who have been dumped or kittens born outside or farm cats. They do need feeding like any other pet cat. Most of the ferals I feed are usually crawling with worms and fleas from having to feed on vermin. Eventually these things do kill the animals. Feral cats are very one to one animals and once you start feeding reguuarlly will come around like most domestics and also let you stroke them. They usually love attention. If you read any advice from vets or the CPL is that a well fed cat is actually a better vermin killer. Most hunters would need food to have the energy to go out and kill. It is a brilliant idea in my experience as most of the feral colonies I feed are on industrial estates or around shopping malls, anywhere they can find scraps of food. They do not have good shelter and a farm would offer this and probably a safer living environment as the amount I find killed from traffic accidents is heartbreaking. If you are interested and contact most sanctuaries or the CPL we always make sure the ferals are nuetered, wormed, and de-flead before they come.