My Yorkie gets aggressive over other small dogs

[MyGoodness]

My yorkie, Sammie (female now 3-yrs old) has always been possessive of me to the point where she gets very aggressive over my Bebe (Shi-poo) who is now 10 years old and any other small dogs. Bebe succombs to her and stays far enough away from me when I come home from work so that Sammie gets my full attention first. If Bebe comes to me at the same time, then she knows she will be attacked by Sammie. Other dogs that have come to my house has felt Sammie's wrath if I pay attention to them. Thankfully she isn't like that with people, just other small dogs. My niece wanted me to watch her tiny pomeranian for couple of weeks while she went on her honeymoon and I had to turn her down because I know how Sammie was going to be. I could tell my niece really didn't believe me but she saw for herself last Christmas when the family got together at my house and she brought her pomeranian. MY Sammie attacked that little pom and my niece freaked out. Does anyone else have this problem with his/her yorkie?

[My lil friend]

The only time Mina is agressive is if I am holding her and someone aproaches,holding their dog or if she is on leash. She is two yrs old and improving. If we go to a gathering where there are other dogs her size and I put her on the ground then she is fine.

[JoeyP]

Welcome to my world

My Zach Hates other small dogs on sight
I have been working on this with him but it's from him not being socialized too much
If you take your dog out and get him or her used to other dogs preferrably at an early age this won't be a big problem

[Princess keke]

Honey has the same problem. Mostly its when she see me giving my attention to other dogs.

[My lil friend]

Mina lives with 4 other small dogs and the neighbors 3lb Morkie is in and out all of the time. I just can NOT be holding her. She has improved onleash.