[Help] Sweet rescued Maltese won't eat

It's been two weeks since we adopted her. We initially fed her a mix of wet and dry dog food - she'd lick up the wet food but leave the dry food, even when we mixed it well. For the past few days now, she has been refusing to eat any dog food at all. We tried the usual tricks: added some normal food (rice, chicken meat, chicken broth), fed her on a schedule, cut down on the treats (which we only use for training)...no results. She usually eats some of the normal food but leaves 80% of the food and all of the dog food in her bowl. I don't understand it: she's always begging with her big sad eyes for my food when I'm eating.Is she just picky? Or maybe sick? She also smells kinda bad (fishy) even though we bathe her. And she is always licking her butt. It looks normal and she has no problems with #2, but could she have an infection of some sort? via /r/dogs http://ift.tt/2s03ade