hi little_mcturtle,
first possibility is: your dog has no hunger and is not able to hide all the little bits and pieces of the food (I guess you don't barf), so she leaves them on the plate and tries to hide the plate as integral whole
the other possibility is: she marks her feeding place through shoveling her nose on the ground, therefore she leaves her smell all around and gives the information, maybe to the cats in case they are out goer, that this place belonges to her.
What does she do, when you hold the plate in your hands during feeding time? Does she eat? Is she shovelling as well?
LG
gs
english version