Often babies in the summer who have to deal with heat, end up having longer ears. So most breeders try not to breed during the summer, unless they have them indoors or in a cooler spot.
Wry Neck
This is where the head seems to
be tilted to either side of the body and doesn't move, only turn more twisted.
It is an infection of the middle ear and is kinda the same feeling to a
human when you get water in your ear. There is no treatment for this, sometimes
it can be straightened out with time. This is not a genetic disease and
nothing would be wrong with the rabbit for pet or meat. Breeders cull these
rabbits because they would not be good for breeding since when they walk,
they often fall on their side from being so "twisted."
Ear Mites/Canker
This is common, but I haven't had
it yet. It is detected by a brownish color in the ear. Rabbits often scratch
their head and shake their head violently. Mineral Oil can be used to kill
the mites, or other medicines. Ear mites spread pretty fast and easily,
so it is best to keep a rabbit confined from the rest of the herd if you
decide to treat it.