Actually, a scissors bite(top slightly over bottom) or level bite (where top meet bottom)is the correct bite for a basset. There are undershot bites where the lower jaw grows longer or the bottom teeth protrude in front of the upper jaw. There is also overshot bites which is the opposit of the undershot bite ,both of these can be to various degrees from slight to extream. If someone has a puppy they were hoping to show and the adult teeth is either one of the latter there is nothing to be done to try and fix the problem,the puppy becomes "pet quality", or should ,there are unscrupulous people out there.