I must confess, I did not follow her instructions exactly. I chose cotton yarn. She did not specify a type of yarn, but if I'd looked carefully at her first photo, I could have seen that she used a silky acrylic yarn. Perhaps it doesn't stretch like cotton does?
Then I started stitching and forming the bunny. I made the head; so far so good.
the Double Moss stitch (scroll down to see it) from "Wayside Sacraments" blog.