Yup Zelda does this A LOT.. When I first got her.. I'm like oh no she hurt her paw she is laying on it weird!
Haha anyways since than i've seen other, especially GSD's do this.
I think its cute now that I know its not a hurt paw..
Why do they do this do you think? Zelda also will sometimes do an actual kick out of her back leg, this seems to be her favorite laying down position!
Horrible picture but heres one of her sleeping on the couch.
Paw tucked, back leg hanging out and stretched out:
Note the "Yoda Ears".. ^^