Human shampoo is made for more acidic skin than your dog's. Here is what happens if you use it, what to reach for in a pinch, and what to avoid.
You should not use human shampoo on your dog for regular baths. Human shampoo is made for skin that is more acidic than a dog's, so it can strip the protective oils and weaken the skin barrier, which leads to dryness, flaking and itch over time. A single emergency wash with a mild, unscented shampoo that is rinsed out very well is unlikely to cause lasting harm. For every bath after that, use a pH balanced shampoo made for dogs.
Here is what actually happens to the skin, what to use in a pinch, and which household products to skip.
Why dog skin is different
pH
Healthy human skin sits around pH 5.5, which is mildly acidic. Dog skin is closer to neutral, usually somewhere between about 6.2 and 7.5 depending on the dog and the area of the body. Shampoos are formulated to match the skin they are meant for. Using an acidic human formula on a dog disrupts the thin protective layer on the surface of the skin, often called the acid mantle, which helps keep moisture in and unwanted microbes out.
Thinner skin
A dog's outer skin layer is thinner than ours, with fewer cell layers. It dries out and gets irritated more easily, especially when washed with products that remove oil aggressively.
A coat that covers everything
Fur holds shampoo against the skin and makes it harder to rinse out. Residue from a product that was not made to be rinsed through a dense coat can stay behind and irritate.
They lick themselves
Dogs groom with their tongue. Strong fragrances, essential oils and some cosmetic ingredients that are fine for people are not something you want a dog swallowing every day.
What happens if you use human shampoo on a dog
After one bath, usually not much. After repeated baths, many dogs develop:
- Dry, tight skin and visible flakes
- Itching, scratching and licking
- A dull, brittle coat
- Odor that comes back faster, because irritated skin is a better home for yeast and bacteria
- Red or inflamed patches in dogs with sensitive skin or allergies
If your dog already has flaky skin, our guide to dog dandruff covers how to calm it down.
Out of dog shampoo: what to use in a pinch
If your dog rolled in something and you have no dog shampoo, here is the order we would go in.
- Water only. A thorough rinse with lukewarm water removes a surprising amount of mud and dirt. For a light mess, this may be enough until you can get dog shampoo.
- Pet wipes for spot cleaning. For paws, legs, belly and face, a pet safe wipe cleans without a full bath.
- A mild, unscented baby shampoo or gentle human shampoo, one time. Use a small amount, keep it out of the eyes, and rinse until the water runs completely clear. Do not make it a habit.
Then switch back to a pH balanced dog shampoo for the next bath.
Household products to avoid
- Dish soap. It is designed to cut grease, and it does the same to the natural oils in your dog's skin. It is sometimes used under vet guidance for specific situations, such as removing oil contamination, but not for regular bathing.
- Body wash and bar soap. Usually too harsh and often heavily scented.
- Dandruff shampoos for people. Some contain medicated ingredients that are not meant for dogs.
- Products with essential oils. Tea tree oil can be toxic to dogs, and many oils can irritate skin.
- Anything with zinc pyrithione, coal tar or salicylic acid, unless your vet recommends it.
What makes a good dog shampoo
- pH balanced for dogs. This is the single biggest difference from human products.
- Gentle cleansers that remove dirt and excess oil without stripping the skin.
- Soothing ingredients such as oatmeal, aloe vera or beta glucan.
- No dyes, parabens or harsh sulfates, and light or no fragrance for sensitive dogs.
- Easy to rinse through a full coat.
What we use at home
Our Prebiotic Pet Shampoo is pH balanced for dogs and made with bio-fermented aloe vera and oatmeal. It removes excess oil without stripping natural oils and supports the skin's microbiome. It is hypoallergenic, dermatologist tested and free of parabens and artificial fragrances. For dogs with sensitive or flaky skin, choose the Sensitive Pet Shampoo. Keep a pack of Pet Cleansing Wipes on hand for quick cleanups between baths.
How to bathe your dog the right way
- Brush first to remove loose hair and tangles.
- Use lukewarm water and wet the coat all the way down to the skin.
- Apply a small amount of dog shampoo and massage it into the skin with your fingertips, working from the neck back. Keep it away from the eyes and inside the ears.
- Let it sit for two or three minutes so the cleansing and soothing ingredients can work.
- Rinse until the water runs clear, then rinse again. The armpits, belly and between the toes hold the most residue.
- Condition long or dry coats to help with tangles.
- Dry completely, first with a towel and then with a dryer on a cool setting for thick coats.
How often should you bathe a dog
Most dogs do well with a bath every four to six weeks. Dogs that swim, roll in things or spend a lot of time outdoors may need one more often, and a mild dog shampoo makes that safe. Dogs with very oily coats or certain skin conditions may be on a schedule set by their vet. Bathing too often with any shampoo, and especially a human one, is a common reason for dry, flaky skin.
What about puppies
Puppies have even more delicate skin, and they are more likely to get shampoo in their eyes while they wiggle. A tear free puppy shampoo is the safest choice. Our guide on when you can give a puppy a bath covers age, frequency and how to make the first bath go well.
Can I use dog shampoo on a cat
Only if the label says it is safe for cats. Some dog shampoos, especially flea and tick formulas, contain permethrin or other ingredients that are toxic to cats. Cats also groom more thoroughly than dogs, so they swallow more of whatever is left on the coat. When in doubt, use a product labeled for cats, or ask your vet.
Frequently asked questions
Can I use Dawn to wash my dog?
Not for regular baths. Dish soap strips the natural oils from your dog's skin and can leave it dry and itchy. Vets and wildlife rescuers sometimes use it for specific jobs, like removing motor oil, but a dog shampoo is the right choice for a normal bath.
Is Dove shampoo okay for dogs?
Dove and other gentle human shampoos are still formulated for human skin pH. One emergency use, rinsed out well, is unlikely to harm a healthy dog. For regular baths, switch to a dog shampoo.
Is baby shampoo safe for dogs?
Baby shampoo is milder than most adult shampoos, which makes it the better choice in a pinch. It is still made for human skin, so it is not ideal for regular use.
Can I wash my dog with just water?
Yes. Plain lukewarm water is gentle and removes a lot of surface dirt. It will not remove oil or odor as well as shampoo, so most dogs still need a proper bath every few weeks. If your dog still smells after bathing, see why your dog stinks after a bath.
