What breed of dog is the only one allowed to testify in a US courtroom?

The only breed of dog allowed to testify in a U.S. courtroom is the "courtroom dog," often a Labrador Retriever or Golden Retriever. These specially trained therapy dogs provide comfort to witnesses, particularly in sensitive cases like those involving children or victims of trauma. While they do not testify in the traditional sense, their presence can help witnesses feel more at ease, thereby facilitating their testimony.