If they believe the other half benifitted from the interference, they can take both down, rarely see it though...once saw 1 half get taken down for inteferring with the other half at pleasanton thoroughbreds...e ntry finished 1st and 3rd...wound up 2nd and 3rd...explanation from stewards was different owners and jockeys...horse who finished 3rd was entitled to be moved up...what about the bettors? Tough shit, lol.