Yes, that makes sense. Tops said in the third movie (in the song "staying tough"), that his father "made him what he was today."
EDIT: In a sense, Tops is the most important character in his family; while he doesn't put food on the table in a world where the leaf-eating dinosaurs can eat plants freely, he prevents them from BEING food on the predator's "table." After all, his defense of the valley from predators is far more valuable to the survival of everyone else than Tria's relaxing in warm mud... I can see a comparison of the two characters now in a conversation...
Tria: How was your day, dear?
Tops: Exciting.
Tria: Exciting?
Tops: Old man longneck and I went to seal a breach in the wall, when a bunch of fast-biters came out of nowhere! They were tough; I knocked down one, and two more came up to me! Old man longneck knocked a couple down, but then a whole bunch more came up from behind us! It looked bad, until I took a chance and charged the leader with everything I had! Once he was down, the rest fled back to the mysterious beyond. It then took Longneck and I several hours to find and push a boulder large enough to seal the hole in the wall, and then some more time to return.
How was your day?
Tria: I ate, went to the mudpool for a few hours, ate some more, picked up Tricia from her "hatchling-sitter", ate some more, rested, and then went out to meet you.
Tops: (mumbling) And she says we contribute equally to the valley...
Tria: What? I can't hear you?
Tops: Oh, uh, nothing dear...
Tria: Alright... Now, remember when we talked about giving Tricia another full sibling? Well, I know a good place to...
Tops: :blink:
Basically, outside of making new Triceratopses, Tria doesn't contribute much...