yikes! if any breeder docks them, they are not a very sharp tool in the shed!

eb's tails are not meant to be docked. they're naturally born with shorter tails.
in europe, the tails tend to be a little longer (though still short--like to the booty hole or just covering it). in america, you can have up to that, or so short that you can't even see that they have a tail (though that is not desirable in show dogs).
one thing you certainly don't want is an inverted tail--where the tail screws 'into' the body. my tilly had that and it had pockets in there that no matter how many times you cleaned each day, it constantly got infected and eventually was amputated. when my tilly was little, she just looked like she had a little piggy cork screw tail. as she grew older, the tail screwed 'in'.
but you're correct--eb's are born with short tails. they're not docked--at least they shouldn't be.