He is adorable! What a sweet face! I would not worry. Mine always take a month or so to really accept the newcomer as one of the family. My dachshund was really bad about snubbing them. She would literally pretend they did not exist but she would also pout and act like her feelings were hurt. Eventually she would just come around and play with the new pup. She is really old now (turned 17 yo this month) and can't play anymore. Her crooked old tail will still wag though.
Cute names. I really like the Captain Morgan name -- must be their commercials.