How to Wash Your Dog Safely with Dr. Bronner’s Soap

Dog Washing with Dr. Bronner's
Photo by Josh McMurtrie

Tucker steals the scene, but before you get distracted by his charm, let’s cover washing dogs with Dr. Bronner’s Castile soap.

Dr. Bronner’s Pure-Castile liquid soap is simple and effective for people and pets alike. It’s made from saponified plant-based oils—coconut, olive, palm, jojoba, and hemp seed—that clean thoroughly while leaving the coat nourished. The scents come from essential oils rather than synthetic fragrances, and the formula contains no fillers, harsh additives, or irritants. As a true soap, Castile soap can also remove fleas and other surface insects during a bath. It won’t act as long-term pest protection, but it cleans them off effectively.

In the accompanying video I explain that I don’t pre-dilute the soap for Tucker. His dense coat holds a lot of water, so the soap dilutes on contact. For other dogs, pre-diluting may be more practical—especially for small breeds or thin coats. A common approach is to mix the soap with water at a 1:1 ratio or more water for a gentler solution: wet the dog, apply the diluted soap, and lather well before rinsing.

Tuck’s nicknames—Tucksie, Chucks, Captain Peanut Butter, Tuckermort, Darth Tucker—sum up his personality: sweet, a little clumsy, loud-breathing, and endlessly lovable. He’s a reminder that a good bath can be a gentle, positive experience for your dog.

Essential oils and pets

Because Dr. Bronner’s uses essential oils for fragrance, many pet owners ask about their safety. Essential oils are concentrated and can be potent when undiluted, which is why it’s wise to be cautious. With Dr. Bronner’s Castile soap the essential oil content is under 2%, and that concentration is further reduced when mixed with water or rinsed off during bathing. As a rinse-off product, exposure time is short compared with leave-on products like lotions.

Despite the low exposure, some essential oils are not recommended for animals—tea tree (melaleuca) oil being a notable example—so if you’re concerned about how your pet will respond, choose an unscented Castile soap to eliminate any risk from aromatic oils.

Bathing cats

Cats warrant special consideration. They groom themselves meticulously and also lack certain liver enzymes needed to safely metabolize some essential oils. Because of that, if you must bathe a cat, use the Unscented Castile soap to avoid any potential issues from residual oils left on the fur. Always rinse thoroughly and keep baths infrequent and as stress-free as possible for the cat.

Further reading

  • Dilutions Cheat Sheet for Dr. Bronner’s Liquid Castile Soap
  • GIY Pet Wipes with Dr. Bronner’s Pure-Castile Soap
  • The Ultimate Guide to Caring for Pets & Their Stuff with Dr. Bronner’s

Other practical uses and tips appear in my book, Soap & Soul: A Practical Guide to Minding Your Home, Your Body, and Your Spirit with Dr. Bronner’s Magic Soaps, available in print and as an eBook and audiobook (narrated by me).