The reason why a dog has a big body and a small head may be caused by genetic inheritance or acquired development. If it has no impact on the dog’s health, don’t worry too much. If it is caused by acquired diseases, you can take the dog to the pet hospital for examination. specific reason. Pay attention to your dog's diet at ordinary times to prevent your dog from being overweight and having a big body and a small head. If your dog is overweight, you need to lose weight, otherwise it will have a certain impact on your dog's health.