Horse tack refers to the accessories worn by domesticated horses. Tacking a horse is the act of fitting a horse with a wide range of equipment before the horse is taken for a ride.
We naturally assume that people who lose an eye would wear an eye patch or use a prosthetic ceramic eye for cosmetic purposes, but few think of how loss of an eye can affect the appearance and career of a prized show horse.
In 1999, veterinarians at the Bronx Zoo Wildlife Conservation Park in New York were perplexed by the sudden death of 24 birds from some kind of encephalitis (inflammation of the brain).