If my SDs aren't up all week 7 they are culled. Ive started gelding boys who aren't up at least 2 week 6 too LOL, I haven't started to geld them if they don't level week 6 yet tho
Leveling is a better predictor than training IMO. Leveling week 7 and then week 14 or 15 are typically good indicators (although, as with everything on this game, nothing is guaranteed XD )