When getting supplies, many owners simply grab the first bowls that they see, not putting much thought into this; however, this can have negative consequences.
The material and sizing plays a huge role, both health-wise and in regard to a Yorkie being able to eat with ease.
Steer clear of plastic bowls, even if they are BPA free. It's not uncommon for dogs to have reactions to plastic; the most common being a gradual discoloration of the nose. In addition, these are prone to sliding and tipping over. Finally, plastic bowls tend to scratch and it is within those tiny nicks that bacteria loves to thrive, making the bowls unsanitary unless cleaned constantly.
Stainless steel is best. Ceramic is another option, but do note that ceramic can break and/or crack. Quality stainless steel does not cause reactions, is a heavier material which allows them to stay in place and is great at resisting scratches.
In regard to sizing:
You'll want to be sure that the bowl is not over-sized. This can make it hard for the Yorkie to reach all of his food, which can lead to frustration and even under-eating.
In addition, when the bowl far exceeds the size of the meal, this often causes owners to believe that their Yorkie is not eating enough, when in fact it is the right about for this small breed.
Some toy breeds prefer a raised bowl, simply because it makes eating easier. If you think that your Yorkie may like this, and you have a floor dish at home, you can place it up onto a sturdy surface to test this idea.
Do, however, choose wisely for raised bowl sets; since the Yorkshire Terrier is very small, the bowls should only be raised up a couple of inches. Any further would possibly impede comfort and ease of eating.
With floor level bowls, you may find that those built into a base work very well for both keeping the dishes near each other and for limiting spills and messes.