Tilted left

I am sitting at a sale right now and a lot of these Holsteins have a tilted head. At first I thought maybe it was a one off due to a tough birth or stiff neck from transport. 5 so far have come across the scale. They sure don't bring much. Any clue on what causes it? They have all tilted left and the ear and eye are also slack. Almost like a stroke.

Tilted left