Triceratops as a big puppy was kind of silly. I think they'd be more like hippos. Angry hippos that can kill you with their nasty horns. But whatev. Then it would be a lot harder to ride them.

This, fortunately, is extraordinarily easy to fanwank. You see, that wasn't a wild triceratops, which tend to behave like a Cape buffalo with a bee up their nose. No, it was the kind that the Silurians knew they would definitely be wanting on their new world: a domestic triceratops. Traditionally used as a draft animal, bred for friendliness because they're dangerous if they aren't, and generally steered by using the Cretaceous equivalent of an apple on a fishing pole. By the time Solomon massacred the Silurians, this one was at least trained enough to know that (a) humanoids have small round objects that are often delicious, and (b) when in doubt, sniff the pants; there are often apples in pockets.

As for the rest . . . yeah. This was crack. Sweet, sweet, crack. I like crack. So, no problems here.