Use leashes to control your dog’s behavior when outdoors. When the dog sees food on the ground, pull it to your side, let it sit down, and give it dog food. Let it develop the habit of looking back at you when it sees food on the ground. This is asking Your opinion is also a sign that you want to continue to be rewarded.
Acclimate your dog to being alone at home. Generally, the reason why a dog digs through the trash can at home is because the owner will feel anxious when leaving the dog, and then he will find something to do for himself.
You can lay an "static blanket" outside the kitchen. Once a dog steps on the electrostatic blanket in the kitchen, the static blanket will generate static electricity, which makes the dog feel very uncomfortable. It will immediately back away and will not step in again, but the static blanket will not cause harm to the dog. .
Attach black tape or other colored markers to the outside of the electrostatic blanket, so that when the dog sees the black tape or markers, he will no longer step into the kitchen and dig through the trash can.