Teddy's body shaking and shortness of breath may be caused by canine distemper, encephalitis, epilepsy, calcium deficiency, heat stroke, poisoning, etc. It is best to send the pet to the pet hospital for examination immediately to avoid delaying treatment. Generally, diseases are more common in puppies, and calcium deficiency is more common in postpartum female dogs. You should pay attention to supplementing nutrition for dogs, especially calcium, ventilate and disinfect the room frequently, and do not bring your dog into contact with other unhealthy dogs.