From movie 5, it's Mr. Threehorn's reaction to his own decision.
"So that settles it. We're splitting up. From now on it's each herd to itself."
It had been a long, hard day in the blazing heat of the mysterious beyond; the cool breezes the night brought did little to change the mood of the dinosaurs from the great valley, traveling to find a new, lush, green place after their valley had been eaten by locusts.
It didn't bring any change to Mr. Threehorn's mind about the decision he had made that the herds should split up. Most of the adults had agreed to his decision, to his satisfaction, but he couldn't help noticing throughout the rest of the day that how unhappy Cera was.
It's that longneck's problem, Mr. Threehorn thought. He lay with his daughter ext to him, together with the rest of the threehorns, as each herd was sleeping with only their own kind. It's all that damn longneck's fault, he thought again. He keeps convincing her to go on adventures and...he's nothing but trouble.
Close by lay Tasha, his former wife. With her were his three other daughters. When she'd left him to go live in another part of the valley, she had gotten them. He had gotten Cera.
She wasn't a great wife anyways, he thought bitterly. It was true---most of their time they had spent fighting. It had mainly resulted when he'd accidentally let it slip that he'd been with another---more attractive---female threehorn named Tria years before they met.
Mr. Threehorn looked down at his daughter. She sighed. "Daddy, why?" she said unhappily.
Mr. Threehorn looked into her eyes. His youngest daughter, only one he really had any more, was the bravest, most stubborn threehorn he knew. And yet here she looked so sad and helpless. What could he say?
"Sweetheart, it's all for the best," he said gently. "I'm only doing this because I care about you. We'll find food and water soon. If we listened to the old longneck..." he tried his best here to keep the hatred out of his voice, "...we'll die."
"How do you know that, Daddy?" Cera said.
Mr. Threehorn sighed. He didn't.
"Littlefoot's not weirdo you think he is," Cera continued.
"You fought with him earlier today!" Mr. Threehorn retorted.
"Only because..." Cera began. "Only cause he was...saying bad things about you."
Mr. Threehorn smiled a genuine smile. That was his daughter, going out to defend him. He had been through some rough times with her, but in the end everything worked out for the best. This would as well, he tried to tell himself.
"Thank you, Cera", he said. "I promise things will get better." He kissed her, and she gently sank into sleep.
Mr. Threehorn sighed. He had at first had little doubt that his decision to spit up the herds was right. He had grown fairly used to living among other herbovores in the valley, but it was so much easier to stick with your own kind.
And then he remembered how Littlefoot's grandfather had saved his life not lo g ago. What if he was i some sort of peril only a longneck could save him from?
He sighed, figuring that on ce he and his fellow threehorns set off, he would k ow for sure. With that in his mind, he drifted to sleep.
In the morning, he found that Cera was gone.
Anyways, how do you like it?