You can use any shape. It doesn't have to be a bunny. Just trace a shape or cookie cutter. This would be cute for any holiday, just use an appropriate cookie cutter to trace and cut out the shape, then whatever yarn works best for that holiday!
Why would Hades sell Cerberus?<--- because after the Hercules incident, and then again with Percy Jackson, he decided that maybe a giant, three headed hellhound wasn't as reliable a guard dog as he thought.