With such a high population of fowl in and about the islands, is a feral cat population considered a threat to certain bird species including any locally kept dinner varieties [chickens] ? Nest location and possibly size and temperment of the bird would have to be a factor in predation. Many feral populations of cats in the US are [as funds and volunteers allow] managed in the same manner, its an uphill battle but results are good if neutering can be accomplished. Then there is always the new arrival that's been dropped off because a litter is due. Maybe not so much a possibility on North Ronaldshay though. MegG in OK ==================