If you love the small one get her !!!!! I didn't think Haley was going to be as tiny as she is 4lbs,, 7 months old, she is adorable and she holds her out to my 7lb Yorkie Harley she don't take any crap from him, as for health wise, i did have her to the vets a couple of times, for throwing up and i did have to change her dog food to all natural foods.... But that is just the chance you take with pure breeds, but i love them both to death.. there my babies, if you like the smaller one better then go for it...... you just have to be more carefull walking around your house, she will always be at your feet....