Bleach baths are great for killing off parasites on your your dog and cat that are hard to get at underneath all that fur. Bleach baths can eradicate flees, ticks, lice, bedbugs, and scabies, by rapidly oxidizing the parasites bodies, because of the active ingredient, hypochlorite. Bleach baths are also able to kill off most forms of bacteria, fungus, and viruses, like ringworm and mrsa.