Doctor Bormenthal's Loyalty
The Heart of a DogThis character-destiny thread traces Doctor Bormenthal's movement from scientific assistant to protector, advocate, and participant in a concealed reversal.
increasing
Bearing strength in each event
decreasing
The Professor's Assistant

A Trusted Colleague
Professional Dependence
Doctor Bormenthal works closely with Professor Preobrazhensky, assists in operations, and receives both mentorship and a salary. His professional life is closely bound to the older surgeon.
Respect Earned
The professor values his competence, while Bormenthal admires the professor's skill and learning. Their partnership gives the coming experiment a close, personal dimension.
The Surgeon at the Table

A Dangerous Collaboration
Working Under Pressure
Doctor Bormenthal assists throughout the transplant, responding to bleeding and a failing pulse. His technical work is essential to the operation's completion.
Shared Responsibility
The assistant is not merely a witness to Professor Preobrazhensky's ambition. He participates in the act that creates Sharikov and shares responsibility for what follows.
Researcher Turned Caregiver

Recording the Changes
A Case Documented
Doctor Bormenthal records Sharik's development and studies the new speech and behavior. His notebook captures a scientific process that becomes increasingly difficult to interpret.
Hope and Unease
He initially imagines that the experiment may reveal the development of an advanced personality. Later conduct undermines that hope, leaving him both observer and caretaker.
Protector of the Household

A Personal Conflict
Repeated Quarrels
Doctor Bormenthal confronts Sharikov over violence, drinking, and harassment. He increasingly becomes the household's direct defender and the professor's loyal ally.
A Dangerous Proposal
As Sharikov's conduct worsens, Bormenthal proposes killing him. The professor's refusal checks that impulse, but does not lessen the doctor's conviction that the threat is real.
A Covert Second Operation

Loyalty Under Pressure
Immediate Action
Doctor Bormenthal helps restrain Sharikov after he draws a revolver. He and Professor Preobrazhensky then act in secret to reverse the original transformation.
Concealment
When police come to investigate, Bormenthal presents the restored dog. His loyalty now includes protecting the household from the legal consequences of the operation and its reversal.
Before the central experiment
December 23, 1924
January 1925
After Sharikov's disorder escalates
After the armed confrontation