My 12yo has been scared of them since he was 8yo and his classmate told him to look it up online. I didn't let him, but he conned his grandma into letting him do it at her house. So now he and his brother (just HAD to tell him about it) are totally freaked out at night b/c of that thing! If you google it, it's pretty freaky. Some people say it's a myth, some swear it's real.
I think it's the ghost of a silkie, from 100 years ago....coming back from theGreat Henhouse in the Sky. She is very unhappy that you don't have any silkies, and wont let you rest untill you get some.