This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
There is never going to be conclusive evidence that it is down to the breed. No one would be so inhumane as to do a study where you mistreat a lot of dogs to see the effects. It is reasonable imo that mistreatment is a major cause of an aggressive dog. You can make a rat aggressive if you condition it that way.
My personal opinion of the dog breeding market in the UK is very low.
Of course they would, and they have, and they do, animal testing on dogs is pretty common. I am absolutely opposed to it, of course, but if someone could have made some money out of it, they would have done it.
Additionally, even the RSPCA when arguing against breed restrictions accidentally reveal quite a damning statistic - of the pit bull puppies they raised, they deemed that around 70% of them were affectionate and non-aggressive enough to be suitable as family pets. That means 30% of them weren’t. I wonder what percentage of golden retriever puppies the RSPCA could raise to be suitable family pets