Littlefoot: I just feel really depressed now guys.

Petrie: Me just got thing that make you happy. Three, Two, One..

The Gang (singing): Always look at the bright side of life... (whistles away)  

In my opinion, Littlefoot is a leader with little experience under his belt. you can only be a good leader with a solid understanding on the three forms of leadership, and most importantly: experience. Case in point; the first movie. After his mother died, he was on his own, and when the rest of the gang joined him, Littlefoot had no experience in leadership. He did not know how to guide, motivate, assert his position, or more importantly in the first movie, resolve confrontations.  

It was only after the first movie, where Littlefoot had some experience in leading a group and therefore, have a foundation to build and improve on in later situations. The moral of the story is that there is no such thing as a natural born leader and leadership takes knowledge and more importantly; experience.

To my knowledge, after someone (in this case Littlefoot) experiences a traumatic event, they go through 5 key stages: denial, anger, bargaining, depression and acceptance.

By the time we get to the scene where Littlefoot encounters Rooter, he was clearly in or on the borderline of anger. so when Littlefoot blames his mother for her death it is an expected reaction from someone that just experienced a traumatic event in their lives.

The Sharptooth = supernatural?

Supposed Superpowers of Original Sharptootht


These cover most of the explanations. I'll add one more.
Maybe Sharptooth isn't supernaturally strong, but supernaturally lightweight? It explains his high jumps and durability, and also explains the fact that his jumping on Littlefoot's mother's back didn't break it.

Still, the most plausible explanation is that sharptooth was drawn that way to make a stronger impression on the viewers.

Thanks for the information. Yeh, when you think about he does to have superpowers, or he is a exception to the rules of nature. Either one of the two.

The original Angry Bird! Prehistoric swine, beware!

Oh no! Those darn Yellowbellies are coming!

Gang: Hey, Cera's happy. RUN FOR YOUR LIVES!!!!!!  

*continuing from above*

Stupid freaking LEGO's! They lie all over the place waiting for a fresh foot! I remember what happened to Cera's Father a while back when he stepped on a sharp LEGO piece... Lots of blood was shed that day...

Cera: You'll get used to it eventually.

Ruby: How do you get used to something that hurts?

Cera: It's called repetition.

Ruby: What's repetition?

Cera: Oh come on Ruby! How can you not know!  

Ruby: Well I know enough to stop when you get mad, stop when you get mad I know.

Cera:    

All three are thinking of how can either an African or European swallow could possibly carry a coconut...  

Cera: Littlefoot, we can't move with that machine gun nest beaded on us!

Littlefoot: I know Cera. Hold up, I have an idea.

Ducky: What is it Littlefoot?

Littlefoot: OK, Petrie & Ducky; I want you two to distract those gunners and give us cover while Me, Cera and Spike will go the...

Ducky: NO, NO, NO!    :! I will not be the bait again!

Littlefoot: oh no.

Ducky: