The reasons why a dog suddenly goes crazy and bites its owner:

1. It may be because the dog’s gums are itchy during the period when the dog’s teeth are changing and the dog bites.

2. It may be that the dog is protecting its food. If the food is robbed, the dog will bite.

3. The dog may feel that its territory has been violated, and it may fight and bite people without mercy.

4. It may also be because the owner has been violated and bites to protect the owner.

5. It may also be because the dog is infected with the rabies virus and bites people indiscriminately.

6. It is also possible that the big dog bites to protect its pups.