I don't think the Rex stepped over the fence...He knocked it down. And the raptor fence, I wouldn't be surprised if they climbed out. Or even jumped out. And the baby Rex was too big to climb it. I think he actually tried to, and it fell over.
From the ashes, a fire shall be woken. A light from the shadow shall spring.
Renewed shall be blade that was broken. The crownless again shall be king.