The development process of puppies during lactation is closely related to the condition of the mother. The lack of necessary conditions for intrauterine development is the basis of congenital malnutrition. Therefore, the prevention of puppies' diseases should start from the aspect of feeding management, that is, providing reasonable nutrition and a suitable living environment for the mother and puppies. Of course, it is also important to use veterinary B-ultrasound examination during lactation.

The response of the puppies' body to diseases has its own characteristics, such as: puppies have strong absorption capacity, weak barrier function, rapid progression of the disease, and easy spread throughout the body. Therefore, it is necessary to use veterinary B-ultrasound for pre-operative examination. When the initial symptoms of puppies' diseases are found, effective prevention and control measures should be taken to control the development of the disease.

The prevention and control of diseases in puppies during lactation must implement the principle of "prevention first, prevention is more important than treatment", and prevention and control measures that are adapted to the physiological characteristics of the puppies' bodies should be taken, focusing on mobilizing the body's defense function and enhancing the resistance of the puppies' bodies. It is also very important to increase the number of veterinary B-ultrasound examinations during lactation, so as to ensure the healthy growth of puppies during lactation.

The reactivity of the animal body is formed in the early embryonic stage, and the level of response after birth depends on many factors such as genetics, feeding, and management. Puppies have low reactivity in the first month after birth, and their defensive adaptability is also low. The reason is that the structure and function of the immune, nervous and endocrine systems are not yet fully developed. Therefore, at this stage, veterinary B-ultrasound should be used frequently to check the digestive system. Ensuring that the puppies suck colostrum in time after birth and providing good feeding and care are the key to the puppy's body gaining a high resistance as early as possible.

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