What nonsense ! The haggis has definitely got one pair of legs shorter than the other. The left pair is longer than the right pair. This is so it can graze easily on hillsides, the shorter pair on the higher side of the slope, so the animal is level. That's why you need a mirror and two people to catch one viz. one hides in the heather with the mirror; the other chases the haggis around the hill. When the running haggis approaches the hidden hunter he or she jumps out and confronts the haggis with the mirror. The animal sees , in the mirror, what looks to be another animal charging at it so it turns round to flee. Then of course it's longer legs are suddenly on the higher side so it topples over, rolls down the slope helpless and is easily seized. Incidentally haggis is from the scientific, Latin name ( Haggis Scoticus Scoticus). The plural is, therefore haggites. Haggi for example would be correct only if it were haggus in the singular.