Awesome job on the harness not a collar.

Pedigree is not a fav I prefer Taste of the Wild in the Roasted Wetlands Foul flavor for my dogs.
There are many favs here to each their own don't be mislead by small breed specialty brands or just because a food cost the most doesn't make it the best.
And then you have to ensure the dogs eats it...
corn is bad never feed a food with corn it has minimal nutritional value and is basically a cheap filler-such things really affect dogs more when they are smaller in size (a lot of small breeds especially do better on grain-less diets-no rice, wheat, corn etc) also a good rule of thumb it doesn't need to be pricey but if yiu arent shopping at a whole foods market you really shouldnt be buying dog food there most of it is junk and over priced for its quality.
Also great job not only contacting animal control and the police departments but be leery of any random claims to her...sadly a found dog add is a free dog ad to some people ask for a description or they bring a pic
the real owner would appreciate that welcome to yorkie talk oh I use dental sprays mine all don't like the tooth paste you can get at the vets..
If you end up keeping her because she is unclaimed-please find a vet that will
do teeters instead of just re-vaccinating her-you don't know her history and over vaccinating is dangerous-even more so in small breeds.
So glad you found Yorkie Talk! It's a wealth of information here (opinions too so sort through it all).
WELCOME!!!!
Oh Yorkies have hair and not fur so using a good brush, along with shampoo and diet will really make a dramatic difference in appearance!
Small dogs don't know they are small, heights (decks, stairs, vehicles, beds, furniture, etc) can be a difficult transition for those used to large dogs.