I found a number of sources online to help, which include CatInfo.org's food chart and Tanya's FelineCRF.org food lists. On the other hand, although very useful and wonderful, I discovered these lists were not exactly up to date, and some of the foods cited as low phosphorous on those lists https://pet-shop-dubai64957.blogsidea.com/42007216/indicators-on-pets-shop-abu-dhabi-you-should-know