It is an adorable little puppy whatever it's ancestry is. Being a littler of 7 it could very well be there was a lot of competition for food even after weaning. The ones that start out smaller do not always have the ability to push their way in to the dish before it's all gone.

As for the size, it is anyone's guess. You can look at the parents for some idea but there is also a huge genetic background that comes into play in these matters. Just prepare them for the possibilities. There is no guarantee with these things.

I totally understand your reasoning and it makes perfectly good sense to me. I think probably because they do not have children, longs for the companion of a dog, she's always had small dogs in the past and feels most comfortable with them, plus big city life it is more sensible to have a small dog. Seriously, a small dog is much sweeter than a hamster and they are not nocturnal, easy to transport etc, etc., etc :)

and that's what I think as well, if they give the pup good nutrition, he'll have a chance to become a standard breed.

All my labs and rottie's where runts of the litter and just because I've had 3 runts in 30 years I'm partial to them. My "runts" we're the best dogs in the whole litters.

Honestly in my opinion and it does not matter but being your dil's first yorkie maybe she should get a sturdier dog. True breeders breed to better the breed and its standards. The lady you spoke of getting the pup from bred for the wrong reasons. Her breeding the dumped dog without knowing the history or health state of the female was in bad taste, because these unknown health or hereditary diseases are now passed onto the pups.

You talk about rescue pups need just as much if not more love then a new pup with possible life threatening illnesses.

Now having given my opinion, I'm also a mom of a handicapped child, whom I took full on responsibility of his health. Issues after I had him and the older he got the more they became. I see pups with health issues 2 ways:
1. Poor breeding and breeding for cash
2. Being the chosen individual like myself that has been given a true inspiration to raise, love and cherish.

I'm not bashing you at all, I think it takes some cajones to post your thread knowing full ware of the good and bad criticism you would receive.