We got our 18th month old, Daisy, a playmate this week. "Darlin' " is a two and half pound, nine week old, part chihuahua and miniature pincher. Same breed as her "big sister".
She is tiny but very playful and very smart. We were amazed that she learned the doggy door the first day in spite of having to jump up to get our since it if for a large dog.
She is fitting in nicely, has some growing to do but may not get much larger. Daisy is really good with her and very gentle, giving her all her toys to play with. They are both sweet pups!