Actually, I didn't suggest the greyhound could be trained - a greyhound that chases and kills a cat may well not be trainable with cats in future. So please be more careful when reading posts, because you're accusing me of something I literally did not say or imply.
Fair enough, I misunderstood you.
I said that these dogs are dangerous in the way that a loose greyhound isn't - there are appropriate mitigations to control a greyhound - a second leashing arrangement, possibly coupled with a muzzle.
So why can't you use the same mitigations with an XL bully?
The bullies would require extensive training, which may or may not be possible, depending on owner and dogs, because their probably isn't solvable with a bit more kit.
Why not?
As I said in a previous post, any out of control dog is dangerous - whether it bites or not. Putting a muzzle on those bullies will not prevent them dragging their owner into traffic, or causing harm in other, similar ways.
But just because a dog is strong enough to pull their owner into traffic, doesn't mean it's automatically a danger. I mean, any big dog is capable of pulling their owner over or pulling the lead out of their owners hands - greyhounds included. Hell, my beagle has pulled me over chasing a rabbit before and he's only 18kg.
I suppose I just don't understand how XL bully that's muzzled, leashed and wearing appropriate gear is anymore dangerous than a greyhound that's muzzled, leashed and wearing appropriate gear?