And I, in turn, must differ w/you. According to the contest rules as stated, only dogs (or fractions thereof) that are swallowed and kept down count toward a contestant's total. Therefore, it makes no difference at all if a dog or portion of a dog is dropped; said dog or portion is simply ignored in the counting. The rules may be viewed at:
http://en.wikipedia.org/wiki/Nathan's_Hot_Dog_Eating_Contest#The_rules