There are a variety of alternative shampoos to cat shampoo on the market. Pet stores typically carry a few different brands of cat shampoo and there are also many online retailers that sell natural and organic shampoos for cats. Some popular alternative cat shampoos include: Nature's Specialty, Paul Mitchell, Earthbath, and Aroma Paws. These brands offer a gentle cleansing experience for your feline friend while also being free from harsh chemicals.