2. Why dogs dig holes: Dogs dig holes in the yard and inherit the characteristics of wolves, which is a very primitive behavior. When the dog is too full, he will dig a hole in the yard and bury the rest of the food. When dogs are too energetic, they will also release energy by digging holes. For fear that others would find it delicious and take it away, it had to hide. This is its instinct. Dogs will take it out to eat when they have had enough fun.