When dogs go for a walk, they are often interested in food dropped on the road and sometimes eat it. But these foods are often rotten or poisonous. Therefore, never let your dog pick up food on the road.

Once you notice something on the road that your dog wants to eat, you should immediately tighten the leash (a metal chain works better) and gently tap the dog's nose to teach it a lesson, so that it will no longer pick up things to eat in the future. However, maybe one lesson will not be effective. It will take repeated repetitions many times before the dog will remember: as long as it wants to pick up things on the road to eat, it will be beaten. So when they see food falling on the ground again, the dog will ignore it.