This, my friends, is one of the things that could make or break the franchise and also lead to a very dark finale movie to the Land Before Time series.
Things to consider that are very unnevering
1.) Chomper's comment that he had longneck for breakfast (a lie of course) but still, the fact that his parents didn't seem to doubt him. Has he eaten leaf eaters, or even, God forbid, longnecks before?
2.) Why was he chasing them in that canyon scene? Was it because they just panicked, saw the shadow, and ran, or was Chomper trying to hunt them, before he recognized them?
If 1 and 2 are true, or even if just 1 is true, that kinda bodes ill for some future time when Chomper and Littlefoot are fully grown, if not sooner.
I mean, consider this
1.) Chomper knows where they live
2.) He knows their scent and could stalk them
3.) Littlefoot trusts Chomper completely and would be caught off guard were Chomper to ever give in to his Sharptooth instincts and suddenly view the gang as "food".
Considering that Chomper is hungry one day and encounters them, perhaps in their late teens or something, will there be a Battle of the Heroes (like Anakin vs. Obi-wan) where the two Prehistoric Pals are trying to kill the other, and know they can't go back to being friends now, finally resulting in Chomper's death at the hands of Littlefoot or other of the other Prehistoric Pals?
(Note: The term Prehistoric Pals is the official term, I heard, for the Gang of Five plus Chomper and Ruby.)
On the flip side, one could avoid Chomper's death by, if 1 and/or 2 are true, having Littlefoot finally realize that Cera, Ducky, Petrie, and Spike were right about Chomper one day being their enemy in V and, the Gang and Chomper finally deciding, for the safety of his friends, that they can NEVER meet again and they part ways? This would avoid the "Littlefoot kills Chomper" scenario, but would be Chomper leaving the Prehistoric Pals, never to return, which, indeed is quite a tearjerker all the same.
However, does anyone think there is a way to avoid the two scenarios above that I'd rather avoid, if 1 and/or 2 would still hold true? Also, do you think it's possible that neither 1 or 2 hold true and this can still work out quite easily?