At a whopping 16kg, and measuring over a metre-long, two-year-old Roberto could be the biggest bunny ever.

His owner, Annette Edwards, said: "He can't fit into a normal size hutch, and even has to sleep on a dog's bed."

A Guinness World Records spokesman said Roberto was the biggest bunny they'd heard of, but they no longer awarded records to big animals.

That's because they're worried that pet owners might deliberately over-feed their pets to get in the record books.

Roberto beats Dancer, the last title-holder, by three kg.

Mrs Edwards hopes that Roberto is fully grown, although Continental Giant rabbits can live for 12 years.