Myself, I prefer showing more realistic movies to my sister’s kids. They’re pretty smart. If I showed them the Land Before Time series, they’d leave the room in boredom.
Don Bluth may have had theatrical hits with American Tail and Land Before Time (and to a lesser degree, The Secret of NiMH), but he pretty much abandoned his creations after they went direct-to-video, choosing to “produce” the shows, instead of actually overseeing their making. He just sits back, letting others do the work while he reaps the rewards (Kinda like the reason he left Disney. He left them because of production staff that treated animators like slave labor - now he’s the one cracking the whip).
You can like his three theatrically released movies - all the sequels to each series were made cheaply (think TV animation - low budget TV animation - that doesn’t use the same animation techniques as the original movies) - or not, but if Paleontologist Jack Horner backed away from the Land Before Time series after the 2nd sequel because Don Bluth never took any of the scientific advice he was hired to provide, it’s not gonna be fun to watch at all.
Besides, I’m comfortably certain that if faced with the threat of starvation, imminent disembowelment by predators, or any other life-threatening event, that a hatchling/yearling/obviously dwarf Apatosaur would NOT break into a song and dance number. (Seriously, it’s been how long since the first one got released? Littlefoot should be a sub-adult by now, but he’s still the same size. I call either severe dwarfism or complete and utter bull-pucks.)