You can also feed your cat a commercial cat food designed specifically for cats with kidney disease with a preference for moist canned foods (vs. dry foods). (cat-health-guide.org)
This can be also seen in dogs with kidney disease. (pethelpful.com)
They also must take drugs to treat anemia, which commonly arises in patients with kidney disease because healthy kidneys are needed to generate the hormone that stimulates red blood cell production. (sciencedaily.com)