Eyes that are AKC Standard approved for French Bulldogs are dark and almost to the point of being black. Blue eyed French bulldogs are not AKC approved. The breed clubs do not recognize any other colors or patterns. This is because some colors come linked with genetic health problems not usually found in the breed. The European and UK French Bulldog fanciers and Kennel Clubs are moving away from the screw, cork-screw or 'tight' tail (which is an inbreed spinal defect), and returning to the short drop tail which the breed originally had. The UK breed standard now states that the tail should be 'undocked,  short, set low, thick at root, tapering quickly towards tip, preferably  straight,  and long enough to cover anus. Never curling over back nor carried gaily.'