To see more of horizon documentaries videos online. br Please visit ► br br In The Secret Life of the Cat, 50 cats were fitted with GPS collars to track their every movement, and cat-cams to record their unique view of the world. In this groundbreaking experiment, a few cats stood out. br br They include the intruder cat, an unneutered tomcat, who comes into the village and seems to have no owner; the hunter, who prefers food that he can catch and kill to anything his owners might buy him; and the deserter cat who has abandoned his home in favour of a new set of owners. br br This film reveals that the relationship between cats and their owners isn't quite what we imagine.