For cats: Most cats don’t really need to have a bath, unless they are older and not grooming, or have allergies or skin disease. Cats will normally clean themselves!
For dogs: A normal dog: bathing once a month is good. Just like people, dirt can build up on the skin and cause irritation and infections. Dogs with allergies or skin disease: Bathing once to twice a week in a medicated shampoo will make a world of difference. By controlling the dirt, dander, and allergen load on the skin, secondary infections are less likely to occur. Bathing also helps to calm the skin, if using a veterinary recommended shampoo. DermaLyte is a perfect everyday shampoo that won’t dry your pet’s skin. Malaseb shampoo can be used to treat skin irritations and infections.