Via the marvels of Malaysian TV, I was able to catch an episode of Dirty Jobs where Mike Rowe visited the McMurray Hatchery to learn how to sex chicks. I just can't get away from chickens, no matter how far I travel.
Interesting techniques they employee to sex the chicks: by checking the feathers at the tips of their wings or by the "squirt and invert" method (you'll have to watch to see what I mean).
Thanks to a little internet magic, I can share the Dirty Jobs episode with you right here and save you all the travel and jet lag of happening upon it yourself:
Back in 2005 when the episode first aired, McMurray Hatchery was churning out 80,000 chicks a week. I wonder what they're up to now?
Oh, and if the above embedded video doesn't work for you, try this link.