1 quart (.95 liters) of 3 percent hydrogen peroxide, a quarter cup (59 milliliters) of baking soda and one teaspoon (5 milliliters) of liquid detergent and lather him up. After five minutes, rinse off your pup and he should be as good as new. Peroxide could fade the hair though. Otherwise, go to a pet store and they sell stuff that will neutralize it.
Tomato juice bath is an old wives tale..