Seeing the title of this thread I have to admit I wondered why @dgstorm would post a thread about animal abuse.
Hey I am all for people making a honest living. They are making money without sticking folks up, selling poison, or running a con and they are tax payers.
I have sexed newly hatched chicks before (not sexting ).
Twelve years ago, I worked at a farm that raised 70,000 ring neck pheasants every year for hunting lodges. Roosters and hens had to be raised in separate pens to keep them from fighting - (they were sexting)! We would remove the trays of fresh hatchlings from the incubator / hatcher and look at the side of the head around the eye to determine male or female. Sadly, for me it was a $10 / hr job and not $60K per year.