Some
breeders have all puppies done if they are keeping a puppy or 2 back so that their show dog has it's ears done (if the ears are done before a
breeder evaluates whom is show potential and whom is pet quality)
others don't do any of the puppies but have no problem if you choose to have them done and will send pics or patterns to your vet of choice if you wish too, although most would prefer you use a vet that is
familiar with a cane corso ears crop.
As you become
familiar with the training style of the
breeder, you may get an idea of the temperament (and
other characteristics) that
breeder will likely look for in his dogs.