A dog may have unacceptable aggressive behavior toward people or other dogs for a variety of reasons. Whatever the reason, it is your responsibility to make sure your dog can interact socially in a positive manner.
Help With Nipping
This bad behavior must be "nipped in the bud" if you want to
ensure that it doesn't turn into biting as your dog ages.
Lemme See (Desensitization exercise)
Although some dogs do not like to be touched, you can
change their behavior with patience and treats.
Walk-bys for Dog-aggressive Basenjis
If your dog pulls on the leash and lunges at other dogs every time you pass one during
your walk, then enlist a friend for "Walk-bys".