It is normal for a dog's throat to suddenly become hoarse. It may be caused by not drinking water for a long time or roaring for a long time. If it is caused by not drinking water for a long time, you need to feed the dog some water to prevent the dog's throat from being too dry. ; If it is due to long-term roaring, it is best to stop the dog from barking immediately and calm the dog's mood. You can also prepare snacks and toys for the dog to distract the dog's attention and prevent the dog from continuing to roar.