I am not a breeder but.. when I take Odie to the dog park he IS the smallest dog there and I have been asked on several occasions if he is a teacup and I always reply .. NO he is just really tiny for his breed.
He is 5 months and is still only 1 lb 8 ozs.. I don't think that he will be a big boy once he has grown up.
But no matter what he is still my baby and I love him to pieces.