Track records are one of the answers Moee, There are 3 speed crosshairs, Fixed , Relative and Moving.

Fixed is the Track record, Relative and Moving is the Winners time, and then the Time of the animal it's self.

The above method is very complicated, and to explain would take ages, whereas the other "dirty" or "proof" method is to look back at results for each track look for dogs that are 1-2 at the first split and complete the race barring any interference, then look back at their form for the last month and find if they have a similar performance at a different track, then write that down and do the same process for as many dogs as you can before you get sick an tired. Then you should have a pretty good figure.