I'm a vegan! And I also own a staffie x pocket bully. I made the choice to go vegan myself. My dog cannot tell me if she would like to be vegan. Therefore, rather than force my beliefs onto her, I have made the ethical choice to feed her an omnivorous diet, as she is naturally an omnivore.
As a fellow vegan, I hope you realise that animals still die to produce our food, just at a lower rate than if we were meat-eaters.
And by calling XL bullies 'beasts' and 'Shitbulls', I question your empathy to animals.