A dog that dies within 20 days of being acquired is not considered a week dog. A dog that is referred to as a week dog is alive and kicking just after it is bought and looks quite healthy. However, it gets sick after about a week. Usually in this case All dogs are infected with parvovirus.

The main reason is that when dog dealers sell and breed dogs, all the dogs are concentrated Together, there are no isolation measures, and canine distemper, canine parvovirus and other viruses are extremely contagious. Generally, puppies are not fully vaccinated and have poor resistance. One dog will get sick, and most dogs will get sick. , this virus has a very high fatality rate for puppies and will cause death of the dog.