I am in the process of making a traditional Santa so, I had to purchase some white fur. I found that the sales ladies at any fabric store do not do a great job when cutting the faux fur and I suggest you recut when you get home. If the fur is not cut properly you get a clean edge to the fur rather than the fur going over the edges to disguise the cut edge.
I use a pair of stork scissors when cutting this fur. You must only cut the backing when doing this. Turn the fabric so that the backing is facing you. Then, use the points of the stork scissors to slide underneath the backing and then cut. The points make this process quite easy and they slide through the fur so that you are only cutting the backings.