Is there a problem with my duck's neck?

[Chick N Momma]

Eventually she started laying on her nest ALL the time, so I believe it was because she was broody! Not sure I understand the correlation, but perhaps she was so used to laying down like that all the time it became habit. She is no longer broody, and she only occasionally has her neck tucked in. Hope that's all that's going on with YOUR ducks!

This is not my duck but could definitely be her!