Dogs vomiting at 6 o'clock every morning may be caused by internal parasite infection, parvovirus, canine distemper or gastroenteritis. They need to be sent to the hospital for examination to confirm the cause. At the same time, you should also observe the dog's mental state. If the dog is in good mental state, it may be caused by parasitic infection, and it needs to be dewormed in time. If the dog is in poor mental state, it is best to go to the hospital for examination and treatment to avoid aggravating the condition. .