I actually agree with the call. This is a very tricky precedent to set, taking down a horse who bumps another horse in the first jump of the race. If you watch lots of head on replays, you\'ll see that in almost every race at every track in the country, someone bumps someone else. So, you can have 2 ways to look at it. Either you can dq everyone who causes bumping, or, you can just say that whatever happens at the start is \"part of racing\" and all the bumps will even out in the end.
You can\'t pick and choose who you DQ for bumping at the start, so you either have to DQ them all, or DQ none of them. I know that some tracks will stray from this rule, but most have to adhere to it.