Humhp... my dogs are doing the same thing. Maybe she just isn't being hungry at the time? I just leave the dogs food out and they usually eat it later in the day. How much are you feeding? Maybe you are feeding too much?

Sometimes I add a raw egg to my dogs' food and they eat it, plus, it helps prevent the goop that comes out of their eyes.

I really don't know what to say or how to help...