Hey, I just ran around this site and thought I should sign up. I have so many questions! I am a Dachshund breeder and want to get into breeding 3-4 Yorkies. I bought my first Yorkie two days ago and Love him already. He is a 6 year old, blue & gold cutie, that weighs 8 1/2 pounds. he's name is Gizmo. I was wondering what size of female will be to small to mate with him. is 7 pounds too small?