Cat or Rabbit?

This cute and oh-so soft backpack from the Stitch 'n Bitch books was one of my first knitting projects (aside from a few failed scarves) and I'm very proud of this. It took me what seemed like six months to finish it. This backpack is lined as well. I gave this bag to my sister, so that she may appreciate it's mysterious cheshire cat grin. All that's really left is to determine the species of this cute cat/rabbit because I want one!