I'm only in this game for abt five minutes so most guys on here have forgot more than I know but what I have picked up on by reading and watching DVD doo ones not blue ones lol is if u get your birds healthy and fit which is the easy part then if you can nail the feeding side of it then your on to a winner IMO that's why I think the likes of farmers who keep doos are good because they know how to look after livestock feeding etc and they do the same when racing doos