Hi
I recorded for 12 months every dog race in WA re for quad system.
I am only going from memory now but on prepost prices Dogs A B C & H boxed did better than dogs A B C &D boxed but only broke even The couple of big wins when the H dog won made it difficult to leave out of the first two legs. The A B C &H had almost as many wins as the A B C &D but better prices. The A B C with E F &G progressively got worse but for some reason the long shot snuck in the first four.
I saw a lot of work just to break even.
Regards Wally