Dog eating habits

I wonder why our Julienne won't eat out of her food bowl? She scoops the food out of the dish with her little paw, then eats it off the floor. Sometimes she just plays with it for awhile, which is how we get dog food under the living room slide out. Makes it harder to keep the ants out! And she's taught Shorty that way of eating, too, so now they both scoop it out of the bowl!