Ears are a funny thing with greyhounds- as puppies they seem to have a life of their own. As they get older they settle down into the more typical rose position. Echo has a lovely ear set but they still seem to their own agenda. Perhaps indicating the wind position?
Or direction she is going?
Apparently her siblings also have her talkative ears-Becca listening?
The Van Gogh one eared looked as modeled by Merlin and his sister Jesse