Digestive system diseases in puppies are mainly manifested as diarrhea and vomiting. Simple diarrhea and vomiting are related to food and environmental stress. Therefore, puppies over 1 month old should be trained to eat puppy food so that they can have a good adaptation process before weaning. It is also very important to use a veterinary B-ultrasound machine to check their digestive system. Virus-induced diarrhea in puppies is mainly caused by coronavirus and parvovirus. The mortality rate of puppies aged 5-12 weeks infected with parvovirus is very high. The clinical manifestations are vomiting, diarrhea, limb weakness, loss of appetite, rapid dehydration, blood in the stool, and panleukocytosis or lymphocytopenia can be seen in the early stage of the disease. The symptoms of coronavirus infection and parvovirus infection are very similar, but the former does not have leukocytopenia. The treatment principle of viral diarrhea in puppies is to prevent secondary infection, stop bleeding, and correct the balance of water and electrolytes. In addition, antiviral drugs, high-immune serum and immune enhancers can also be used. After taking the medicine, use a veterinary B-ultrasound machine to check the digestive system after treatment.

The growth and development of puppies at different ages have their own morphological structures and physiological characteristics. The main physiological characteristics are: weak body resistance, lack of innate immunity, and maternal antibodies can only be obtained after sucking colostrum. If the number is small, the resistance is low. The resistance of young animals mainly depends on the degree of perfection of the body's physiological functions and the feeding and management conditions. The reactivity of the animal body is formed in the early embryonic period, and the reaction level after birth depends on many factors such as genetics, feeding, and management. The reactivity of puppies is low in the first month after birth, and their defense adaptability is also low. The reason is that the structure and function of the immune, nervous and endocrine systems have not yet developed. It is necessary to use veterinary B-ultrasound machines frequently to check the status of their organs. Ensuring that young animals suck colostrum in time after birth and giving them good feeding and care is the key to the puppies' bodies obtaining high resistance as soon as possible. Veterinary B-ultrasound machines can see the development of the digestive organs of young animals.