Are my uggs authentic?

At first I thought they were but if you look at the fur it looks a little fake and the line on the shoe is a little light. Compare with one of your friends to see if the inside of the shoe feels the same, that's a good hint. Also go to a store with uggs and talk to the person selling the shoes. Give them your shoes to look at. If you've been ripped off you don't want to let it slide. Hope I'm wrong about them being fake, and good luck!!!