I have 1 female khaki who is about 11 months old. In the last month she has been keeping her head really close to her body. Squishing her neck and sinking her head down. She pretty much stays like this all the time. Is this normal? We got her as a baby last year and she has never done this before. We also have a khaki drake, Indian runner drake and Indian runner duck. The IR duck is sitting on the nest with both girls' eggs. Coco- the female khaki- doesn't show any interest in sitting on the nest but does go in for about 20 minutes a day at which time Chick-a-dee (the IR) comes out for a swim. We did get some new ducklings but they only went outside a week ago, long after she started squishing her neck. Why is Coco squishing down her neck and head and it is it normal behavior?