[@DocTachyon] Yeah I think their equally childlike demeanors will have them get along well, though ironically Dandy knows far less about space than the other resident aliens, and remembers nothing about where they came from. Dandy can only copy something they can sample the DNA of, so Hayden's dinos would have to be perfect replicas down to the genetic level for Dandy to copy them. 

Not that they still wouldn't be thrilled by Hayden's shapeshifting. They would probably do their best to imitate a dinosaur with the genetic templates they have on hand, with probably horrifying results.