Chicken Sexer. Really – it’s not what it seems. Baby chicks are difficult to tell apart by gender. With some training, though, you can learn how to tell them apart. Since only hens lay eggs, egg producers don’t want to buy many male chickens. Chicken sexers can help them choose only female chicks to purchase.
Professional Sleeper. Medical researchers need subjects for their studies in sleep apnea and other sleep disorders. For their work, they hire professional sleepers, who allow themselves to get hooked up to machines that measure vital signs and monitor symptoms as they sleep. Other professional sleepers are hired by hotels to evaluate their beds and mattresses for comfort and their rooms for an atmosphere conducive to sleep.