Regarding the flat ears, this varies from rabbit to rabbit. Most rabbits will see their ears drop and hang down by their cheek as they develop from baby to adulthood. So this is relatively normal to see. But if they hear any noises, those ears are definitely listening. Most rabbits will sleep with their eyes open. This trick is developed early on for predators. Rabbits take lots of naps during the day. So while the eyes are opened, they are actually having a little nap. Our breathing slows down when we relax and are no longer active, the same goes for pets. But it is good that you notice these things now as you will be alert for any issues that could arise down the way.