I discovered a number of methods online that will help, including CatInfo.org's food chart and Tanya's FelineCRF.org food lists. Even so, when very handy and amazing, I found these lists weren't precisely up to date, and many of the foods cited as very low phosphorous on People lists were not https://louispbmvf.pointblog.net/details-fiction-and-pet-shop-jlt-80592630