Feral cat population growing in south Buckinghamshire
26 August 2013 Last updated at 07:26 BST
Cats are often treasured family pets, but now a growing number of them are making new homes in the wild and causing problems for the RSPCA.
In south Buckinghamshire they have been forced to begin a neutering programme after animal welfare bosses admitted they needed to control and reduce the feral cat population.
Keith Doyle reports.