Here we go again.
Theres zero proof that Kimbos genetics are in any of the XL bullies that have killed.
There are (or were, they are probably still breeding) breeders claiming that their dogs were related to Kimbo, but as the pedigrees are literally produced on someones computer with no actual proof, nor checks of any kind, and such people are closely linked to serious crimes... its likely very few, if any, are actually related.
That particular organisation has been asked (multiple times now) how many dogs in the UK have DNA links to Kimbo.
So far, zero response, at all. They have no proof for this claim.
I think its likely that some of these dogs (who are all crossbreeds to one degree or another) have the A22 gene and many have had some horrific housing, upbringing, and some have also had intentional training in 'protection' work which seems to involve a lot of goading the dog into biting a sleeve or bite suit, and then beaten the dog round the head with sticks whilst it hangs on and won't let go (if it lets go it gets a shock from a shock collar in some cases).
There is currently very big money in training members of the publics dogs to attack and bite and hold on cue, and those who can't afford to pay can simply watch myriad TikTok and Youtube videos showing you how to train your dog to do this.
If you breed easily aroused, easily frustrated, hard playing, hard biting dogs, with dodgy temperaments in shitty housing, fail to meet their needs, fail to train appropriately and instead train using suppression and punishment, even if you DON'T then train the dog to actively bite people, you're creating a dangerous animal.