The dog's flesh is drooping from the chin to the neck, still soft, but alive and kicking. What's going on here?

You can feel if there is a lump or something in it. If so, the possibility of tumor cannot be ruled out. You should take the dog to the hospital as soon as possible. If not, it feels soft, and it should be the dog's "double chin". Oh, it is caused by obesity. It's nothing. Just pay attention to a healthy diet.