My girls would never scoff down their food and I was starting to think they were broken beagles /forums/images/%%GRAEMLIN_URL%%/frown.gif Everyone kept telling me they were, beagles normally don't stop eating... not don't eat at all. I mean, they would eat.. eventually.
So we changed their food. That lasted for a few days of eating when it was put down, then off again.
We've just decently changed to Royal Canin (not sure if it's in America) and they LOVE their food. As soon as it's put down, they eat it all. Not at a great rate of knots, but they still eat. Sally likes to paw one piece of kibble out at a time and eat it. Crazy girl.
I'd try swapping her food, it might just be that that foods not right for her?