Sorry I didn't mention it before but I meant to say also that video cameras "inside" the pen would sow the raptors inside, in time with whatever's "going on" in there.If the whole attraction was done via bushes shaking, snarls, and an animatronic cow being lowered into a pen, I could imagine quite a few guests disappointed- although it would easily tell the storyline, most visitors want to see dinosaurs for themselves and not just get the impression that they're nearby (which is why I've always pitied guests who aren't capable of or don't want to ride Jurassic Park River Adventure- pardon a tiny raptor in the Discovery Center, they won't experience a single dinosaur within the Jurassic Park area.
This way children can be diverted and anyone who wants to see some blood can get their fill.
Who knows, maybe, if they build this hypothetical pen, an AA raptor will lunge at the fence and sparks will fly. That would be a pretty cool and thrilling thing to see as you're strolling by!
And once Trike opens again, more dinos will be seen.
Aviary, anyone?