This is my longer transcript of the lore panel Q&A answer, btw:
They kept saying "more info in the lore book", both then and when I asked au ra questions at a PLL before, but I've still yet to see anything come out of the lore book that we didn't already know. :(
Quote:More info in the lore book, but also: it's hard for a tail or horn to be removed. They don't shed. They grow continuously until they reach a certain size then stop. They don't grow super long. If they're damaged, in a fall or in battle, they will slowly regrow until they reach the maximum size again. The horns themselves are hollow and the vibration of sound inside them aids their hearing. Is their hearing better than a lalafell who are supposed to have the best hearing? No their hearing is about as good as a hyur, just in a different way - hear it / process it differently. More in the lore book!
They kept saying "more info in the lore book", both then and when I asked au ra questions at a PLL before, but I've still yet to see anything come out of the lore book that we didn't already know. :(