Large species of terrestrial mollusks are used for human consumption and are bred for this purpose. They have become a part of national cuisine in many countries. Histology is used in many fields of humane and veterinary medicine. Its main essence is that this method can diagnose the presence of formations and inclusions. It is used to determine this process's structure and stage of development. Samples of different tissues can be used as material for histological examination. The specialist analyzes and describes the histological preparations obtained after processing the material. Thus, we proposed a histological method of studying snails. This method can provide the data of snails’ state as a whole. Snails of the species Helix aspersa maxima, Helix aspersa muller, and Helix pomatia were the material for the study. Ten snails of each species were selected for the experiment at different periods: immediately after hibernation, five days after wakening, 14 days after wakening, and at the time of their active life – in July. First, we conducted histological studies of snails during their active life, i.e., in the summer months. Therefore, for this purpose, snails for the experiment were taken in July. It was determined that if the snail eats and has an everyday life, its digestive gland generally consists of digestive tubules separated by intertubular connective tissue containing hemolymphatic sinuses and hemocytes. Thus, in our research, we studied the structure of the digestive gland. A circular muscle layer surrounds each tubule. There are three different cell types in the epithelium lining the tubules of the digestive glands, which differentiate into digestive cells, calcium cells, and excretory cells. Digestive cells are the most numerous cellular component of the tubular epithelium of the digestive gland. Basally located nuclei of digestive cells have a round or oval shape. During the rest period, the digestive gland of snails is characterized by a complete loss of digestive function and the transformation of digestive cells into excretory ones. Metabolic products are not excreted into the environment. When they accumulate, they fill all cavities in the body of snails, namely the lumens of glandular tubules, excretory ducts, stomach, and intestines. Food intake in snails increases the level of metabolism. It stimulates the differentiation of digestive cells, the functional activity of excretory cells, and the volume of excretory products. It leads to the complete liberation of the digestive tract from accumulated excretion products during the rest period. The structure of the digestive gland is completely restored.

Heliceculture (breeding of snails) has been practiced in Europe for a long time, and here, in Ukraine, the first snail farms appeared literally 10 years ago. Ukrainians quickly realized that among all areas of animal husbandry, heliceculture is the most profitable. At the same time, you can start a business almost from scratch, and the risks are minimized. This is how the snail boom spread throughout the territory, and now molluscs are grown in almost all cities of Ukraine. It should be remembered veterinary and sanitary requirements on snail farms must be given important attention, because if they are violated, it can lead to the death of molluscs and cause great losses. Taking into account the importance of growing snails in farms and the lack of regulatory and technical documentation in our country, the purpose of this work was to clarify the main veterinary and sanitary requirements for such farms. In this work, the general veterinary and sanitary rules for snail breeding farms, requirements for water and feed, preparation for transportation, vehicles, types of containers, packaging materials and requirements for keeping snails in the field in the summer are carefully considered. Owners of snail farming farms are obliged to implement economic and veterinary-sanitary measures that ensure the prevention of the death of molluscs, maintain premises and facilities for storing feed and processing snail-farming products in proper condition, prevent environmental pollution with waste, comply with zoohygienic and veterinary-sanitary requirements for placement, construction, commissioning of objects related to keeping snails. Compliance with these requirements in the farm plays a big role in the cultivation and maintenance of snails. This will make it possible to grow snails, avoiding any diseases that are inherent to them and death, which will make it possible to obtain snail farming products of high quality and safety. Therefore, in order to prevent invasive diseases, snail poisoning, etc., managers and specialists of these farms (farms) are obliged to ensure the implementation of a set of general veterinary and sanitary measures, as well as the implementation of veterinary and sanitary requirements for the construction, equipment, operation of snail farms and their compliance sanitary regime.