I found a couple of means online that can help, including CatInfo.org's food chart and Tanya's FelineCRF.org food lists. However, though quite beneficial and wonderful, I found these lists were not particularly updated, and many of the foods cited as lower phosphorous on All those lists were not below 0. https://pet-supplies-dubai01009.onzeblog.com/35692617/how-fish-food-can-save-you-time-stress-and-money