u/Deep-Log-1775

I started watching Dinosaurs on Netflix and I have a question... I'm sure I'll have many more as I continue the series.

At the beginning they introduce the pachycephalosaurus and say he's trying to get back to his harem of females. Is this artistic liberty or are there ways to know how these animals behaved socially? For example, could it be equally likely the male pachycephalosaurus did a mating dance like birds do today?