text: The world's biggest bunny is preparing to see his heavyweight title challenged - by his giant son. Darius, who measures over four feet long and weighs in at a whopping three and a half stone, is officially the world's biggest rabbit. But his title is now being contended by his son Jeff, who already measures 3ft 8in - with six months left of growing to do. Scroll down for video . New contender: Jeff the rabbit, pictured with his owner Annette Edwards, measures 3ft 8in long and is set to challenge for the title of the world's biggest bunny . The rabbits' owner, Annette Edwards, 63, from Bromsgrove, says she looks forward to the day when Jeff dwarfs his father. It costs her £5,000 a year to feed her giant bunnies as they munch their way through 2,000 carrots and 700 apples. The pair both also eat a huge dog bowl full of specialist rabbit food every day, and a bale of hay a week. Ms Edwards said: 'Although the pair of them are huge, they're the best animal friends I could ask for. Giant genes: Jeff, left, is pictured with his giant father Darius, who currently holds the record for being the world's largest rabbit . Rabbit fan: Ava Johnson, seven, struggles to pick up the monstrous Jeff as he is almost as large as her . 'They are both very laid back and chilled out - Jeff really takes after his Dad. Most rabbits like lots of attention and get on well with children and these two are no exception. 'They're even friendly to other animals! Jeff's best friend is my other pet, a boxer dog called Kay.' Continental Giants are the largest breed of rabbit and can grow to around 4ft when fully grown but Darius - who is officially four foot four inches long - and Jeff come from a bumper crop. Jeff was born after Ms Edwards introduced Darius to one of her other rabbits Sally - another Continental Giant who measures 3ft 5 inches. The family all live in her back garden but they are so big that they each require a dog crate that would normally house a pet as large as German shepherd. Annette added: 'Darius was always big but Jeff is huge considering he's still a baby. I'm expecting him to grow much bigger than his dad. Competition: Darius the rabbit measures 4ft 4in long while 3ft 8in Jeff still has six months of growing to do . Big breed: Continental Giants are the largest breed of rabbit and usually grow  to around 4ft at their biggest . 'As soon as I think he's made it, he'll be measured by his vet and then Guinness will certify that he is the biggest rabbit in the world. 'Even though they're so big, they are very low upkeep. They really do look after themselves most of the time. 'They run free in the garden during the day and at night go to sleep in their cosy crates. They never make a mess and actually would be great house rabbits. 'Although when they start to moult at the end of the summer, they need a good daily brush. 'And being the world's biggest rabbit, and his son, they've got a giant appetite to match. 'But it's actually good for them to be eating hay all day long - to keep their teeth and digestive system healthy.'
target: Darius is world's largest rabbit at 4ft 4in, weighing three and a half stone .
  But his son Jeff is 3ft 8in and still has six months left of growing to do .
  The monstrous pair are owned by Annette Edwards, of Worcestershire .
  Both munch through 2,000 carrots and 700 apples per year, costing £5,000 .