Moeee,

Here is a strategy I use that throws some good winners. Look at the realdogs or hotdogs rating of the dogs. Also check out the tipsters pick for each race.
Find races where they mostly disagree on who will win. This gives you a race where the odds might be some value. Just before the race run the dogs through the system and if one dog shows a good chance of winning and is paying morethan $4.00 back the dog. A good chance of winning would be calculated odds of less than $2.50.

Good Luck with it.