What group of animals are called dray?

The word "dray" isn't typically used to describe a group of animals. It's most commonly used to refer to:

* A type of cart or wagon: Often used for hauling heavy goods, especially in the past.

* A term for a unit of measure for beer: One dray is equal to 36 gallons.

There isn't a specific group of animals called "dray." If you're thinking of a different word, please provide more context!