I found some sources online to aid, including CatInfo.org's food chart and Tanya's FelineCRF.org food lists. On the other hand, although extremely useful and fantastic, I found these lists were not specifically up to date, and many of the foods cited as lower phosphorous on People lists were not below https://andreslxiue.dailyhitblog.com/43316809/best-dry-cat-food-fundamentals-explained