Oh I love tigers and you've done a nice job! Thanks Ken for the ear advice, like Lorraine, it's hard for me to get the ears right too! Lorraine, if you're lucky enough to have a housecat running around, you have a good model for tiger drawings. They are quite similar in structure, size is a bit different.
Remember on tigers, there's a big "W" that runs across their face - it starts high up on the outer cheekbones, down toward the muzzle and then up to meet in the middle of the forehead.
Also, when drawing almost any kind of animal hair a quick way to get a realistic look is to start with a firm stroke at the base of the hair and "swoop" up ending with a light stroke. Take a look again at Ken's cat drawing, especially under the ear, notice how light the end of the stroke is.
Let us see some more from you - thanks for sharing!