I was wondering if there are any health issues that the Sussex chickens have that others don't? Last year my Speckled Sussex died out of the blue ay about 4 months old...no signs of any problems, all my other breeds in same pen fine. 3 weeks ago I lost a Coronation Sussex of the same age and again one this week. All the other breeds in area are fine. Please, any help would be appreciated. I really love the Sussex chickens, but I have had no luck thus far with them.