Duck problem

[Jiannax11]

Hi so this may not be an emergency but my duck just recently started laying down completely stretched out with her neck on the ground. She's 3 and never once did that. I'm very worried and want to know If anyone else has experienced this? I cannot take pictures because when I walk out to her she gets right on her feet...

 

[redsoxs]

Are there other ducks around her? Sounds like a submissive mating position?

 

[Jiannax11]

There's one other female duck, it's not submission. She just sleeps that way and it worries me because she never did this before