Yes, some dog breeds have been selectively bred to have a stronger territorial instinct than others. 


For example, breeds such as the Akita, Rottweiler, and German Shepherd are known for their strong territorial instincts. 


These breeds were originally bred for protection and guard work, and as a result, they have a natural inclination to defend their territory and family. 


Other breeds, such as the Labrador Retriever and Golden Retriever, were bred for different purposes and typically have a more friendly and outgoing temperament.