Lux, a 10kg (22lbs) black-and-white Himalayan, scratched a seven-month-old baby in the face, according to police in Portland, Oregon, USA. When the child's father Lee Palmer struck the four-year-old animal on the rear in retaliation, it began charging at the family, forcing them to take refuge in their bedroom. "He's very, very, very, very hostile," Palmer told an operator in a panicked 911 call, during which Lux could be heard screeching in the background. Palmer added that his pet had a "history of violence".

"It's extremely rare for a domestic cat to behave like this", says John Bradshaw, founder of the Anthrozoology Institute at Bristol University and author of Cat Sense. With more than 80 million pet cats in the US, the exceptional nature of the case suggests that Lux "has a screw loose", he adds. If a kitten doesn't encounter a human in a friendly context between the ages of three to eight weeks, it is more liable to go feral. A cornered feral cat "will bite, it will scratch, but it's not a fight to the death - it won't come back to finish you off", Bradshaw says. "Cats are never aggressive for no reason," says Sarah Ellis, an expert in cat behaviour at the University of Lincoln. "It is our duty to protect cats from feeling fearful of us by ensuring they have the appropriate early socialisation."