Even when they were young...12-20 weeks?Well I’ve had a lot of roosters and none of them were interested in pullets before they were about to lay or had started. Even when their hormones were raging.
Just about every cockerel I've hatched was after their 'sisters' big time by 12-16 weeks.
Not the full grow cocks(12+ months old), they've been good, best indicator of when a pullet is close to laying. I only keep one at a time, but have been thru several.