I'm glad to hear the three row comb isn't the best way to tell the gender. At what age are pointy saddle and hackle feathers obvious?
A lot of people swear by the early 3 rows, but it sure doesn't work for mine, lol... I believe the hackle and saddle feathers start coming in around 10 weeks, maybe 12... just part the feathers around where the tail base is and look for super shiny, pointy new feathers growing...