Dinosaur Train/WMG

Don has Downs Syndrome
That's not an underbite, he's eating his own beak. He also asks questions that were just answered.
 * How would him eating his beak be related to down syndrome? Also, his asking a question that was just answered, he could just be asking to make sure his thinking is correct or that he heard correctly.
 * You're expecting logic on a wild mass guess? Okay, I'll give you a little: one physical sign of Downs is a flatter face. How do you do that with a long beaked/muzzled species?

Shiny has OCD
She also needs to have things her way, and was quite frustrated when her family doesn't let her.

Xiaotingia (or at least the original study including it) will be mentioned in a future episode.
Come on, why else would they do a Jeholornis episode?