I would check with the breeder you used for your adult dogs on this to be sure its done right.
If nothing else, google the breeds breed club site, it may have the inof, or you could contact one of the listed breeders for help and mentoring.
How old are the pups? Docks must be done at 3-5 days of age, so if this is a new litter it can be done. If this is an older pup and you are wondering if it was docked properly, then it would be too old to correct at this point.
Either way a breeder from the breed club would have these answers for you. Could maybe also show them a picture of your dog and they can tell you from a pic of the length is proper.
If their pups, nake sure to get them done ASAP..it is counted by number of joints to take off and cannot be done past the first week of life. Calling a listed breeder would probably be a better option if newborns are the case.