Captain Nebula wrote:
Odo modeled his hair like Dr. Mora Pol, the Bajoran Scientist that worked with him when he was first found. Why did all of the other Changelings have hair just like Odo then?
There natural form is as a liquid. They aren't humanoid at all. Odo wasn't a good shape-shifter, remember. He did his best to imitate a form, but when they take the shape of a humanoid, perhaps they either A) wanted the Alpha Quadrant to know they were changelings or B) this is how their natural faces look, smushed and ill-defined features. Like a baby can babble, but can't talk in sentences. It's just the least of a form they can take.