i for 1 dont like the darkness system yb kept in dark tricked in to double moult.why to do well at last 2 or 3 races sorry not for me. then as yearlings start to drop at 250 mile .not all but a lot more than natural yb,s.this i have found out asking fellow fanciers who i race against. the molt takes a good bit out of yb,s of this i am sure .it might even weaken their immune system . out on the wing or in their cage in sunshine when we get it is my way .to them that fly darkness yb,s hope you still have them after their 1st old bird season.
question how many darkness yb, have you got that done well between 250 and 400 as yearlings. i ask because like the rest of you i am still learning