General Resident Horse Management

More than 13% of operations with fewer than two resident horses reported the horses never left the operation, compared to 1% of operations with 20 or more horses. Operations were more likely to routinely isolate returning horses where the primary use of horses was racing (42.1%) and breeding (17.6%) than operations with other primary uses.


For operations with horses more than 12 months of age other than broodmares, those horses most often were vaccinated against tetanus (63.2%of operations), influenza (63.0%), and herpesvirus (42.8%). These horses were less likely to be vaccinated against rabies (24.5% of operations), Potomac horse fever (PHF, 18.0%) or Streptococcus equi (13.3%).

Facility Management

Operations with a primary function of farm/ranch were less likely to confine horses indoors (restrict them to the inside of a building, such as a barn, shed, or stable) in either the summer or winter than operations with other primary function. A larger percentage of operations in the Western region than in other regions rarely or never confined horses indoors (86.3% in the summer and 76.2% in the winter).


Almost all (99.5 percent) operations that gave at least one horse a dewormer gave a pulse (noncontinuous) dewormer, while only 12.5 percent of operations gave continuous dewormers, fed daily (methods were not mutually exclusive).

From NAHMS Equine ’98 Study. For more information,see the NAHMS web site at

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