Well, Lando's allosaurus will kill and eat the triceratops, obviously. What Lando doesn't know is that Vader poisoned the triceratops' lunch, and its flesh is now toxic. Allosaurus doesn't have long to live, I'm afraid :(
Lando learned his lesson and injected his Allosaurus with a retro-virus containing Ysalamiri DNA. Lando is riding a towering Force-void bubble of death.
What? Since when could you reproduce the Ysalamiri effect in dinosaurs? You can't just remove the force. How absurd. I'm taking my dinosaurs and going home.
According to the illustrated dinosaur books I had as a child, the triceratops is pretty much designed for T-rex (and by logical extension, Allosaurus) gutting.
What is that third dinosaur doing in a cage?
Wait, shit, what am I saying? Of COURSE that's not his entire plan; he's got something up his sleeve! I wanna change my vote!