This video has the best recipe for a skunk rinse for pets should your pet have an unfortunate encounter with the black and white striped critters. We've had occasion to use it in the past and it works very well, much better than the tomato juice that seems to be a common solution to the problem.
If you don't want to watch the video, the recipe is: 1 quart 3% hydrogen peroxide, 1/4 cup baking soda, 2 teaspoons Dawn dish washing liquid. Mix the ingredients in a one quart pail and apply to the dry pet from the collar back, avoiding the eyes as the peroxide will sting. If you need to use it in the face, use a sponge to carefully apply. Lather the pet and let it stay on until you notice the smell is abating. Rinse and repeat if necessary up to three times. The sooner after the skunk has sprayed that you can apply it, the better. It's good to have the ingredients on hand in your cupboard.