Apex Predators Before the Flood

It is interesting to think of how critters lived before the Genesis Flood, especially those predators that would not take any guff off anyone. But like in the Old West movies where someone says, "This town ain't big enough for the both of us", there is no reason to think that the mean ones all lived in the same area.

It is interesting to think about how dinosaur predators existed with other predators before the Genesis Flood. Answers may be inferred from predators living today.
The Animals Entering Noah' Ark, Jacopo Bassano, 1570s
Dinosaurs with sharp claws and (as Tim the Enchanter might say) nasty big pointy teeth. It may be fun to watch them strutting around looking for a fight like rival gang members, but is that plausible? We know from fossil evidence that there were some rip snortin' fights, but those were probably the exceptions. The same kind of safe distance thing can be inferred from predatory animals living today.
A [CMI] reader from Ukraine, B.V., asks some interesting questions about what dinosaurs are found buried together and why. His message follows, with a response from Philip Bell, intended to provoke fruitful thought on the topic, not as an exhaustive answer to the questions raised.
How did that many animals get along before the Flood? For example, there were such apex predators in North America, as Tyrannosaurus, Daspletosaurus, Siats, Acrocanthosaurus, Torvosaurus, Allosaurus etc.

We see traces of interaction between T. rex and Triceratops, Allosaurus and Stegosaurus. If they lived at the same time, why don’t we see traces of interaction between T. rex and Stegosaurus or Allosaurus and Triceratops?

There were some intelligent and agile creatures among dinosaurs. Why aren’t they as high as most of mammals in the fossil record?
Philip Bell replies:

Thank you for your question. I’d like to answer your question in a slightly unusual way.
To bite into the answer, click on "Pre-Flood predatory dinosaur interactions and the fossil record".