I found a couple of methods online to help you, like CatInfo.org's food chart and Tanya's FelineCRF.org food lists. Even so, whilst really beneficial and fantastic, I discovered these lists weren't precisely up-to-date, and a number of the foods cited as low phosphorous on those lists were not below 0. https://messiahrdozj.jiliblog.com/94240773/an-unbiased-view-of-cat-food-dispenser