I have a female mini who was very similar to this. Very excited, bouncing around all the time, very in your face. We also have a rabbit that she was obbessing over, she would sit at the cage and whine and if the rabbit made a sudden move she would dash at the cage and smash her teeth off the...
Usually when introducing a new dog (or human) I take my dogs into a neutral place, like the lobby of my building. This way the dog who has established the home as "his territory" will not want to drive the new dog out of the area because the existing dog "owns" it.
Try to socialize them...