Their Type of Coat or Skin
Long-haired and curly-haired dog breeds generally require more regular bathing and grooming to keep their coats from matting, says the American Kennel Club. The AKC also recommends bathing these types of dogs at least once every four to six weeks, with regular brushing between baths to maintain the coat. Short-haired breeds such as Labrador retrievers can get away with infrequent bathing as long as they're healthy
What if your dog has no hair? Hairless breeds like the Chinese crested dog, who lack the skin protection a coat provides, need to be bathed weekly. Dogs who tend to have oily skin, like cocker spaniels and basset hounds, also benefit from more frequent baths to prevent oil buildup on their skin, points out Care.com.
Allergies or Skin Problems
Some dogs suffer from allergies or skin conditions that may require regular bathing with medicated shampoo. In these cases, the right dog bath frequency will depend on the instructions provided by your veterinarian. Dogs with itchy skin may also find relief from regular baths with a colloidal oatmeal shampoo. You should always consult your veterinarian if you suspect a medical condition, and they can provide guidance about when such remedies may be helpful. Dogs who don't respond well to oral or topical parasite treatments might need regular baths to help keep fleas and ticks under control.
Your Health and Comfort
Sometimes pet parents can benefit from more frequent dog bathing. For example, if you're allergic to pet dander or if your pup tends to bring outdoor allergens into the house, regular baths to clean your pet's coat might help you breathe easier. And if your pooch is allowed on the furniture or into your bed, bathing at the first sign of stink will make them easier to live with.