Awww...they are precious!
If you don't mind sharing, I'm curious why the Breeder surrendered these two?
I'm surprised they look as remarkably well cared for, for being Breeder Dogs who have been kenneled all their lives.
Have you had a chance to check out their mouths for tooth decay? They may need a dental.
I foster, too for YTNR...which rescue group are you fostering through? I commend you for fostering these little ones and wish you the best of luck in their adoption!