The Tsengel dialect is one of the foreign dialects of the Tuvan language. It is spoken by the Tuvans of Northwestern Mongolia, who live in the Tsengel sumon of the Bayan-Ulegei aimag. To some extent, we use the concept of “Tsengel dialect” conditionally, because at present the functional status of the Tuvan speech of the indigenous inhabitants of the Tsengel sumon of the Bayan-Ulegei aimag of Mongolia has not yet been established, as a result, the combination “language of the Tsengel Tuvans” sometimes appears in the work, where the term “ language" is not opposed to the term "speech", they are used by us as synonyms. The article provides a comparative analysis of the names of diseases of domestic animals in the speech of the Tsengel Tuvans with the literary Tuvan language, as well as with dialects, in some cases in neighboring Turkic and Mongolian languages.