Which restraint method is a narrow enclosure that immobilizes an animal for treatment?

The narrow enclosure that immobilizes an animal for treatment is known as a stock. This method is commonly used in veterinary settings, particularly with larger animals like cattle or horses. The stock confines the animal in a controlled space, preventing movement that could jeopardize the safety of both the animal and the veterinary staff during examinations or procedures.

The design of the stock allows for adequate access to the animal while ensuring it remains safely restrained. This helps in performing tasks such as vaccinations, examinations, or other medical treatments without the risk of injury from an unrestrained animal's movement.

Understanding the appropriate use of stocks and their role in animal welfare is crucial in veterinary practice, as it helps minimize stress and improve safety during treatments.