If it's a sprinter down in distance and that horse has won before at the shorter distance,it's a no brainer as it's obviously got some chance. More difficult is a 2000 type going back to 1600 or so. It's a question of price in that case (so long as the horse has had success at the shorter distance). Two examples: (1) La Bella Dama 7/10/2001 loses by 12.3 lengths Canberra Cup (2000m Quality Hcp),27/10/2001 enterred Group 3 Moonee Valley 1600 (down 400) and wins at 33-1,showing that her trainer wasn't "doing his dough" by shifting her and stumping up the extra costs.That she then won the McKinnon,up to 2000 again,(at 50-1 tote) the next week shows that moving horses around pays for astute trainers (and punters).Example (2) Jameela has been sent to Randwick 10/04/2004 by Tony McEvoy and thrashed 17.7 lengths in a 2600 Group 2, after previously winning at 1600,1700,1800 and doing O.K. at 2000. Now,8/05/2004 she is back in Adelaide in Group 2 1600 (Down 1000m!!!!). Why wasn't she spelled or something?? one might ask. Answer:because she won at$43 on the tote!!! What I'm getting at is that when they go down there has to be an EXTRA angle, something unexpected in the placement of the horse to justify a suspicion of victory ahead.Cheers