There were also little details in the movie that didn’t make sense, like that huge pig-thing that drank and wasted enormous amounts of water, which was no doubt precious, and had little conceivable purpose.
If you think about it I guess that makes sense, but wouldn’t the same apply for the dewbacks on Tatooine? And why do the Stormtroopers magically have one after landing to search for the escape pod? Were they really keeping them in captivity on the Star Destroyer to take with them on planetary missions?
Fair enough. I guess I never thought much about it because we didn’t see dewbacks drinking enormous quantities of water, so it could be assumed they don’t need much. Some lizards can drink the dew/rainwater that collects on their backs and is channeled to their mouths. I would imagine that that’s the origin of the dewback’s name–and perhaps its sole source of water (the fact that their are moisture vaporators on Tatooine hints at their being enough water in the atmosphere to keep humans and other animals going).