Flea Doctor is Easy, Effective, and Chemical-FreeRegular flea collars, shampoos, and baths use chemicals that can be harmful or irritating to your pet. Flea Doctor uses an electric charge to kill and remove fleas without toxic chemicals. Advanced Comfort-Charge TechnologyFlea Doctor uses advanced Comfort-Charge technology to find, zap, and remove fleas—and their eggs—from your pet’s coat. Our unique technology uses an electric charge that is safe and comfortable for your furry loved ones.