They just need some time to adjust to each other. For the past 4 years he was an only "child" and now all of a sudden their is this tiny little maniac in his face, biting and trying to play with him. She your new little girl is still a puppy she is full of energy and wants to play. play, play! If she gets too crazy you can always put her into her crate or play area for a puppy time out. When I brought home Doodlebug, Pebbles drooled for about 2 weeks. Eventually, they all worked it out and now the three get along great!
Welcome to YT! We would LOVE to see some pictures of both your little ones
