Sink or swim sheep

My friend Amanda and I traded notes every day for at least half of high school. She was a grade ahead of me and I guess we became friends toward the end of my freshman year. We wrote a lot of stories and made up sort of fantastical adventures (that mostly involved invading Canada and taking a boat to Europe). One of the inside jokes that came out of that was sink or swim sheep. I'm not exactly sure about the premise anymore, but I was thinking about it the other day. I am terrible at staying in touch with everyone I miss, so I made her this sheep in a life preserver and went to visit her.