Normally, Shiba Inu dogs do not attack other dogs. However, if a Shiba Inu attacks other dogs, there may be some reasons:
Fear: A Shiba Inu may attack other dogs because it feels scared.
Defensive instinct: Shiba Inus may think that their territory is threatened, so they will attack other dogs.
Other issues: Shiba Inu may show aggressive behavior due to lack of adequate socialization and training, or it may be due to certain health issues display aggressive behavior.
If your Shiba Inu exhibits aggressive behavior, it is recommended to take it to a veterinarian and pet behavior expert to find out the specific cause and develop a corresponding training plan to correct this behavior.