I don't see a way to stop that unless it is moving the bowl. I've actually seen dogs walk with food a lot. Harley would always grab mouthfuls of food and then come chew them in the room where people were. Reece does that a little too but not as bad. He basically won't eat unless I go stand near his bowls. I have a friend with two boxers and one of them takes huge mouthfuls, walks through three rooms, drops the food on the dining room floor and then eats it.