The reason why dogs dig holes may be because of their nature, or because their owners have not trained them well. Dogs are born with the behavior of digging holes, it is their instinct. Dogs living in the wild often dig holes to find food or to hide from the weather. Dogs at home may also start digging holes out of boredom or other reasons.
However, dogs may also develop digging behavior because their owners have not trained them well. For example, if the owner does not give the dog enough exercise or attention, the dog may start digging holes in search of stimulation. Generally speaking, there are many reasons why dogs dig holes, including nature, boredom, looking for excitement, looking for food, etc. If you find that your dog starts to dig holes, it is recommended that you first consider whether you are giving your dog enough attention and exercise, and you can try some training methods to correct your dog's behavior.