Here are some examples:
* A pair of draft horses: These horses are specifically bred for their strength and pulling power, often used for farming or heavy hauling.
* A pair of carriage horses: These horses are trained to pull a carriage, often used for leisure activities or transportation.
* A pair of show horses: These horses are trained for competitions, such as dressage or driving.
It's important to note that the term "pair" can also refer to other types of horses, such as two horses that are related or that belong to the same owner.
So, while the most common meaning of "a pair of horses" is two horses working together, it can also have other meanings depending on the context.