agree to an extent sammy but a good doo will alwas be a good doo wether it was an untrained late bred or not. Latebreds will "doo your head in ". Train with the next years young birds but most of them need to be cajoled along the road first. I would train them from as little as a mile 2 or 3 times, then 2 then 3 then 4 then 5 then 7 then 10 miles, before you give them the big stick with your young birds. But as i said before if its a really good doo you could start it at 40 miles or 50 or 100 miles even and as long as its fit and well you'll get it