There are too many unanswered questions. What does make sense is that no musher is going to give a banned drug to his dogs just hours before a mandatory drug test, that defies logic. None of the mushers would do that especially the top 20, all it would do is hurt the sport, but there lies the issue, animal rights activists hate the Iditarod these groups of people bomb organizations they oppose, they set fires to homes and businesses that they are against, they release animals from labs and zoo's. For a very long time PETA and other groups have gone after sponsors and supporters to stop this race. It is not beyond them to sneak into the dog yard or sabotage the food supply to make the mushers and the race look bad. they intentionally targeted one of the top 20 knowing that the dogs get tested after the race. With the high levels reported it had to have been done after the race was over. Those dog yards have no security, people are in and out constantly.