"crude fat" refers to the total amount of fat present in a substance, such as food or a sample. It is a measurement that gives an idea of how much fat is in that particular substance. Full definition
It has 26 percent crude protein and 12 percent crude fat. (pawster.com)
The guaranteed analysis indicates that the food is about 52 % crude protein minimum and 31 % crude fat minimum on a dry matter basis. (kittycatter.com)
Similarly, pet food labeled as «low fat» or «lean» can not exceed a certain percent of crude fat. (okcpetsmagazine.com)