At one point the baby indricothere encounters an adolescent indricothere of three years old. The adolescent creature looks just like an adult. However, at the end of the episode, when the youngster is also three years old, it still looks just like a calf - bigger eyes, different facial features and a different skin texture.
As the mother aggressively drives her calf away, the direction of their shadows changes from one shot to another.
The orientation of the shadow changes when the baby Indricohere is drinking from the muddy pool and it switches from a CGI animation to a puppet.
After chasing away the Entelodont, a little bush appears next to the young Indricothere between shots.
The mother Indricothere keeps flapping her ear from time to time, obviously to drive away insects. In some cases, the ear actually passes into the side of her head.
When the Hyaenodon attacks a Chalicothere, forces it to the ground and kills it, take a look at their shadows: the predator doesn't cast one on the struggling prey, only on the ground, and even that does not correspond with the shadow of the Chalicothere. It makes it look like as if the Hyaenodon is leaning onto nothing.
The two Entelodonts lock their jaws together in combat, but as they do so, their shadows do not touch.
If you look closely at the chewing entelodonts, their large lower teeth clip though their upper lip at every bite.
When the calf gets up from hiding and rushes away, he doesn't cast a shadow on the rock wall next to him, only on the ground, even though the shadows of the surrounding trees and the angle of the lighting indicate that he should. His shadow is also a different tone, much lighter than those of the other objects in the shot.
In a handful of close-up shots of the indricothere calf's head, there is a white piece of equipment or the shoulder of the puppeteer clearly visible behind its head at the side of the screen.