Apply horse live prop from Scene > Props > Template >
The horses are made as 3D live props, iClone 3D
Live Props contain 3D props
with embedded animation segments. It is usually used to contain multiple loopable animation clips to represent the multiple movements of a living creature.
The behavior of Live Props can be set in the timeline
by right clicking and selecting target animation clips, eg. a horse can walk, canter, gallop, pesade, etc.