I don't know why
ALL my next Yorkies will be rescues. I tend to like males and I DEFINATLY want Seniors. As far as weight, I don't really consider 10 lbs to be huge, so I don't know why.
I am going to contact
Jamiesaari - She is a member here. Maybe you have read about her? She has unlimited Vet care, but can not really afford a HUGE adoption fee. Also, she lives in Canada and she has a 6 yr old girl. They just recently lost a Senior Gal they rescued, but also just got a 6 lb Female rescue, and they have been searching for a playmate.
I don't know if it would work out, she keeps getting rejected by rescues b/c she has a 6 year old daughter

I know it is very depressing for her. This boy sounds perfect for her, but that would be she would have to have him flown into Canada, and I am not sure that you do something like that?