Your cat needs prebiotic and probiotic insoluble and soluble fibers. However, your cat needs these in a form that they can digest and utilize in their bodies. This is tricky to do at home without the research and development teams of large companies backing your experiments! Thus, it is best to buy these in the form of supplements or high-quality cat food. This ensures that your cat will get everything they need in a form they can use consistently. Hill's has been trusted by vets for decades to provide everything your cat needs when they have tummy upsets, and you can rely on them and take the guesswork out of the equation.