What are the signs of dogs digging graves?

Without warning. In fact, dogs dig holes without warning. In fact, it is caused by traditional genes, or it wants to bury things. After all, dogs have the characteristics of wolves, which is the most primitive practice. If the dog is full and finds that there is still a lot of food, he will choose to dig a hole in the yard to bury the rest of the food. Of course, if its spirit is good, the most important thing is that it is afraid that others will be strong or eat it directly. It will also choose to dig a hole to release its energy. Generally speaking, it is caused by one's own instinct. When it feels a little hungry after playing enough, it will directly take out the food to eat.