A Stable Master or Head Groom is the manager

Management

Management in all business and organizational activities is the act of getting people together to accomplish desired goals and objectives using available resources efficiently and effectively...

 in charge of a stable

Stable

A stable is a building in which livestock, especially horses, are kept. It most commonly means a building that is divided into separate stalls for individual animals...

.

At large horse

Horse

The horse is one of two extant subspecies of Equus ferus, or the wild horse. It is a single-hooved mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today...

 establishments there may be several groom

Groom (horses)

A groom is a person who is responsible for some or all aspects of the management of horses and/or the care of the stables themselves. The term most often refers to a person who is the employee of a stable owner, but even an owner of a horse may perform the duties of a groom, particularly if the...

s under the management of the stable master.

In a professional establishment the head groom usually has complete responsibility for the horses including devising training schedules, choosing feeds for optimum nutrition

Nutrition

Nutrition is the provision, to cells and organisms, of the materials necessary to support life. Many common health problems can be prevented or alleviated with a healthy diet....

 and ensuring the horses are shod, wormed, inoculated and provided with timely veterinary

Veterinary medicine

Veterinary Medicine is the branch of science that deals with the prevention, diagnosis and treatment of disease, disorder and injury in non-human animals...

 care.

In a private residence

Great house

A great house is a large and stately residence; the term encompasses different styles of dwelling in different countries. The name refers to the makeup of the household rather than to any particular architectural style...

 the stable master has these responsibilities and must also accommodate the riding schedules of the employer’s family and, if necessary arrange for lessons and training. The stable master must insure that a groom is ‘on call’ during specified hours in case any members of the employer’s family wish to ride. The stable master is also responsible for the special needs of aged and retired horses, and usually for the maintenance and overall appearance of the stables. The stable master may or may not report to a steward

Butler

A butler is a domestic worker in a large household. In great houses, the household is sometimes divided into departments with the butler in charge of the dining room, wine cellar, and pantry. Some also have charge of the entire parlour floor, and housekeepers caring for the entire house and its...

 or estate manager.