“Heart of a Dog” is a satirical novella by Mikhail Bulgakov, written in 1925. The work tells the story of Sharik, a stray dog, who is taken in by Professor Preobrazhensky for a scientific experiment involving the transplantation of human organs. As a result of the operation, the dog transforms into the human-like creature Polygraph Polygraphovich Sharikov, whose behavior becomes a metaphor for the social changes taking place in post-revolutionary Russia. The novella is a sharp satire on the Soviet regime and ideology, raising questions about human nature, morality, and the consequences of scientific experiments. Due to its critical content, the work was not published in the USSR until the Perestroika period and was officially issued for the first time only in 1987.