This is the full proof mixture. 2 quarts of hydrogen peroxide, 1/2 cup of baking soda, and a full tablespoon of dish soap. Mix together in a large bowl and put on your dog while still fizzing. Rub it in all over but concentrate on where she got sprayed. Let it soak for 5-10 minutes. Then rinse out. You won't even be able to tell she got sprayed. My dog got sprayed twice this year already.
Don't do tomato juice, just stains your dog and masks the smell.