Duke barks

Duke has been a such a sweet puppy, he has not barked. Today he did. Once! I was getting out of the shower and he let me know he was not going that route again. Tonight he played with a white German Shepherd who is 10 months old and about his size. He had a lot of fun and was a little tired when he got home. I've also been corresponding with a woman who knows A LOT about hounds and she has suggested he may be part black mouth cur. I tend to agree. I sure learned a lot today. Google the breed.