There are many scenes in LBT in which dinosaur anatomy is somewhat "adapted" to the requirements.
Not only does Ducky have four fingers but also an opposable thumb (I'm not sure if even Iguanodon's thumb was opposable).
We have many scenes in which the quadruped characters perform movements which they couldn't realistically do. They could never grab the vine the way they do in LBT 7 when it snaps.
In LBT 3 we have Littlefoot rear up on his hindlegs and spreading his "fingers" to signal uncertainty (about why the Thundering falls are gone).
In many movies (e.g. Cera in LBT 4) we have quadruped characters sit in a very human manner. This would require their shoulders to have very exposed ball and socket joints, same as a human arm, a theory that is also suggested by the fact that the knees of the character's front legs sometimes point forward and sometimes backwards.
There are countless other examples, but they are really something that I consider fun to discuss but not a point of real criticism. Dinosaurs couldn't talk to begin with
