The dog died after a sudden madness and barking.

It is not common for dogs to suddenly go crazy and bark, but if this happens, it is likely that dogs are already in a very dangerous state. If the dog suddenly loses control, starts barking, running around, or even attacking people, it is likely that there is something wrong with its body. Here are some possible reasons why dogs suddenly bark wildly:

1. Diseases: Dogs may suffer from certain diseases, such as rabies or other nervous system diseases, causing them to suddenly lose control, bark and run around.

2. Poisoning: Dogs may eat some poisons by mistake, such as drugs or harmful chemicals, resulting in poisoning symptoms, which are manifested as sudden madness and barking.

3. Trauma: Dogs suffering from severe physical trauma, such as brain injury or impact, often lead to problems in the nervous system, resulting in out-of-control symptoms.

Unfortunately, if the dog suddenly goes crazy and barks and dies afterwards, the seriousness of the dog's illness can usually be seen. If you have a pet, you should take it to see a doctor in time and have regular health checks to ensure its health. If your dog suddenly loses control, you'd better take it to see a doctor immediately, so that a professional veterinarian can make an accurate diagnosis and give timely treatment.