Excellent points. And therein I think lies the answer to why someone may or may not have cresteds. My ducks are livestock first. We enjoy them but we have them mainly for eggs. I need strong healthy egg layers. I cannot afford special needs birds, or low hatch rates so I wouldn't breed cresteds. We have crested drake. We totally enjoy him. He lost his sibling at a young age from a crested related issue (seizure) so he is the only one we have. He seems quite healthy and robust- but we will not breed him. He is one of the few ducks we have that is a flat out pet (he doesn't lay eggs and he will not be bred). It just doesn't make sense for our backyard farm. So I am grateful for Kevin's info. It was that info that helped me understand why we lost the one duckling months ago and it affected our decision to keep our MoMo as a pet but not breed him. I never once felt like he was telling me I should feel guilty or bad that I had a crested. I feel empowered actually because now I know. Now the choice is on me but at least I have the facts. And I also have to say with the dog breeds- when we researched what dog breed we would settle on for a puppy recently. I DID look into health issues related to each breed. I did not make a silly choice based on only what the dog looked like (we looked at temperament too). We went through and picked the types of dogs we liked and then narrowed it further down by looking at health issues related to the breed. Because of that certain dog breeds were ruled out. (ruled out basset hound because we just didn't want the upkeep one required for their adorable droopy eyes and ears), no pugs (breathing issues among others)...so we not only do our homework with ducks...but that sole decision really brought to light how we make decisions on all animals we bring to our home/farm. We settled on a lively, smart, stubborn dog breed that does have some health issues (all dogs really do, you just have to decide what YOU can handle personally and financially) and we are thrilled with our choice. Be informed. Knowledge IS power. I like to be powerful.