We just had our 2nd yorkie, Mac. He is 7 weeks old and My Yorkie, Bevo is a mommas baby...he will have ABSOLUTELY nothing to do with the baby. He actually runs from him...but when we are out say at Petsmart, he loves to greet other dogs! The babys momma is staying with us until he is 12 weeks old, and Bevo won't have anything to do with her either! I guess it just depends on the dog! If your little girl is very attatched to you, I doubt it will matter if you add another one...she will always still love you and want to snuggle with you!! And I agree, that it would be great to have her a playmate while you and your hubby are gone...That was my intentions with adding a new yorkie...hopefully Bevo will come around!!