The nipping can be worse with the following, pups brought home that were not socialized properly with other adults and kept with the pack during the critical phase of bite inhibition, during the five to eight week period, anyone getting their pup before nine weeks is asking for heightened testing of the teeth, those that bought said pup from mills or where the pup was housed in a kennel with other pups where human did not interract as chew toy and shape the personality for the prospective owners, will be more so than those who chew on breeder during five to eight week stage and are trained and corrected properly several times a day.
many pups are very spoiled when brought home, who cant spoil them?
and than they are braver and braver about the mouthing thang.
that is why it is crucial t hat pups be wi6th a conscientous breeder until at the very least, 9 weeks of age, one who will sit in the den of mouthing teething pups and correct and train and has them in their home, not in a kennel situation.