Feral Rakla

Tribes of Casanii ferals have been known to form close bonds with rakla packs; the rakla themselves are certainly neither tamed or owned by the youngsters, but once their respect has been earned some will even deign to let the bravest of young Casanii to ride upon their backs. As the ferals mature the rakla gradually grow more wary, sensing the potential competition and unwilling to be controlled. The developing relationship will often encourage the maturing Casanii to leave the ferals and seek to earn their place in the tribe.

In general, ferals do not fight from mounted. They use their mounts to get across the battlefield

Source: Chat with Mike Thorp