Taking the guard hair from a rabbit's ear is the way to go. You want to mix the packaged dubbing with some guard hairs you take off of a hare's mask. This will allow you to get as many guard hairs in the mix as you want. Below is a short video showing an excellent method for doing just that.
Getting more guard hairs in your flies will make them come alive in the water. They impart movement to the fish & will be more successful for you. Take a quick look at this video & enjoy: