Jackalopes

Jackalopes are a type of mythical creature briefly mentioned during the series. Their first mention, although they were not named at the time, was in the first book where a group of gnomes were chasing a hoard of bunnies with antlers. These creatures are later in Lodestar confirmed to be jackalopes through the toy, Harry the Jackalope. They presumably take on the traits of a rabbit, as they outrun the gnomes easily.