It will be hard to tell if she is mixed. There are poorly bred bassets with long legs. Her mother looks pure enough the sire could have been a beagle to a foxhound type dog,who knows,so to really guess is fruitless. You love her that is what matters but you are going to get those remarks all the time,just say you don't know if she is mixed but she is a great dog. Thanks for loving her either way.