[Mike Darancette]

I would imagine that a large eating machine like T-Rex was opportunistic. If it was already dead - cool, almost dead T-Rex would help it along and on top of that T-Rex was an ambush hunter.

In those days meat was meat. Nothing could be too proud.

[Doctor Stochastic]

Eagles and lions also go for carrion. It's a fast food mentality.

[jlogajan]

I would imagine that a large eating machine like T-Rex was opportunistic.

That would be the most robust.