HALF of XL Bully dogs are reportedly descended from a massive inbred pet dubbed Killer Kimbo - creating unstable, violent animals.

       Home Secretary Suella Braverman has vowed to outlaw the killer dogs after the latest horror attack on an 11-year-old girl in Birmingham.

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       Killer Kimbo has gone on to father hundreds of XL Bully puppies 3

       Killer Kimbo was bred from two siblings Credit: YouTube 3

       Killer Kimbo's family tree

       Bullys have been linked to nine deaths, including three children, since 2021.

       Breeders in the UK charge customers more than ￡2,500 for XL Bully puppies.

       It has now been reported that more than half of the animals on the market are descended from one ferocious beast known as Killer Kimbo.

       The Telegraph reports that LA-based Kimbo was the product of two dogs with the same parents - and passed his inbred genes onto hundreds of puppies.

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       BullyWatch campaigners told the newspaper that Killer Kimbo's family of beasts are responsible for at least ten attacks worldwide - and likely many more.

       Keven Jones, 65, from Wrexham in Wales, bled to death after he was reportedly mauled by his son's XL Bully Cookie Doe - both of whose parents were related to Killer Kimbo.

       Four-year-old Mia Derouen, from the US state of Louisiana, also died after Killer Kimbo's direct descendant Niko savaged her in 2014.

       It took cops 12 bullets to kill the out-of-control XL Bully when they arrived at Mia's home.

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       An 82-year-old woman in Oklahoma is among the other people who have reportedly been killed by dogs related to Kimbo.

       Expert Gloria Zsigmond told The Telegraph: "Kimbo bled into all those bloodlines because he was early on and he was so dominant in breeding.

       "Kimbo’s offspring became very, very popular and they’re still so popular in the UK to this day - it’s extremely troubling."

       Gloria said that 32 out of a sample of 50 stud dogs touted by breeders online were related to Kimbo.

       Their sellers reportedly give them bizarre names like Unstoppable Juggernaut, Frank Sinatra and The Joker.

       XL Bully superfans are said to believe there is a stash of Kimbo's frozen sperm which could be used to breed dozens more monster dogs.

       Breeder Andre Smith slammed Killer Kimbo's owner Gustavo Castro, from Huntington Park in LA, for carrying on breeding him after attacks were reported.

       He said: "Kimbo is known amongst a lot of the breeders as ‘Killer Kimbo’ - because his offspring have been documented to carry a rage that is not normal."

       It comes after horrifying footage showed the moment an XL Bully grabs a tiny dog by the throat in a savage attack - as a man tries to pull the beast off.