How do I teach a goat her name?

Acorn is a little under a year old and we are very close. She follows me around the pen, nuzzles me, and loves it when I pet her. She's extremely affectionate and it's adorable!

However, I don't think she knows her name. When I say "Acorn", she doesn't react any differently than to any other word. She's very bonded to me, and I always use her name with her, so how can I make her learn it?