i was working on a little system yesturday at the TAB, what i did......

very simple

look at the DFS form down the bottom of the page (on the tab walls) then if that number appears in all the boxes, your onto a good thing,

its better if there is only a total of 4 different dogs in the dfs form, if every number appears leave the race alone as its probably wide open,

and dont worry about what box the dog starts in, using this system there where 2 dogs that qualified in the time i was there yesturday
both started from box 4,
both won, paying $4.6 & $5.0

a good dog can win from any box

jimmy