So, a question that may make me look like an idiot- I got the impression that the 'crest' on crested ducks was the result of a mutated gene that's frequently fatal, that their heads are actually deformed underneath....is that true? Do I have to be careful handling these ducks around their heads, like a newborn with a soft spot? Or is it all a bunch of hooey? Would obvs. appreciate input from people who have actually owned and handled cresteds.