Take 20 grams of feed into 80cc of water, put it into a blender and stir it to be a fluid. After cooling, measure the electrical conductivity with electrical conductivity meter. The following are some of the numbers we have measured. From low to high, we found that the conductivity of the Renal feline formula is the lowest. Feline low activity/senior feed is ranked second. It is enough to see that the greater the conductivity, the worse on the kidneys. It is recommended to choose a feed with relatively low conductivity as a daily life.