rather than repeat what I wrote a while ago ... go to this link http://www.yorkietalk.com/forums/yor...ml#post2437795
I had such a problem and THE HONEST KITCHEN food saved my dog's life.
I recommend it highly you can get some samples size on ebay (so you do not have to lay out too much money) and find what Abby may like.
It is a dehydrated raw diet in different flavors. All you do is ate hot water. My girls like FORCE.
or try this site to get a sample size.
Click here: THE HONEST KITCHEN DOG FOOD - FORCE 1 OZ SAMPLE~ TRY IT
if this does not work, use the link on the site I sent you to originally.