What potential negative behavior can arise if a strong single-person bond is not managed proactively?

Answer

Possessiveness or resource guarding of their chosen person.

If the intense bond is unmanaged, it can evolve into possessiveness where the dog guards their favored human when others approach.

What potential negative behavior can arise if a strong single-person bond is not managed proactively?
behaviorDogpetbondDachshund