Some horses may be transported individually and some may be transported together.
On the requirements of the regulations, for stocking density or space to avoid overcrowding, for example, our regulations refer to the International Air Transport Association live animal regulations, which outline specifically the square footage that each animal must be provided when being transported. They also require that the animals be compatible, and there are some elements of the container: how it should be built, what it should be made of and what the specific details of the container are.
The regulations in some cases refer to International Air Transport Association live animal regulations, but in the case of the spacing, they are quite prescriptive, depending on the size of the horse, obviously. The larger the horse, the more space per horse should be provided.