Yes, Dawn dish soap can be used to kill fleas on your pet. The soap works by breaking down the flea's exoskeleton, causing it to die from dehydration. Fill a bathtub with warm water and add a few drops of Dawn dish soap. Place your pet in the water and use your hands to create a lather, making sure to work the soap into your pet's fur. Leave the soap on your pet for at least five minutes to allow it to work. Rinse your pet thoroughly with warm water to remove all of the soap. Comb your pet's fur with a flea comb to remove any remaining fleas.
While Dawn dish soap can be effective at killing fleas on your pet, it should not be used as a long-term solution. Dawn dish soap may be safe for occasional use, but it can cause skin complications for your dog. Flea infestations require more comprehensive treatment, including treating your home and yard and addressing the underlying cause of the infestation. Additionally, frequent use of soap can dry out your pet's skin, so it's important to consult with your veterinarian before using any new products on your pet.