Does anyone have any information on a Cayuga duck with a ball of fur on its head. One picture is of 5 ducklings, about 2 weeks old with 1 of them with a ball of fur on its head and the second picture is of a single baby duck at 2 days old with a ball of fur on its head. I have 1 drake and 3 hens. So all together I have had 9 baby ducks born in the past 2 weeks and I have 2 more duck eggs sitting under a Speckled Sussex hen at this time. Maybe 1 of the 3 hens has the Crested gene. Any feed back would be helpful.