Brewers rice is the small milled fragments of rice kernels that have been separated from the larger kernels of milled rice. (AAFCO definition). Brewers rice is a processed rice product that is missing many of the nutrients contained in whole ground rice and brown rice thus reducing the quality
Brewers rice and second heads are one of the many byproducts that rice milling creates. Second heads are milled rice kernels that are one half to three quarters of the original kernel. Brewers rice is a milled rice kernel that is one quarter to half the size of a full kernel. Second heads, depending on their quality are used to make rice flour. "If the quality of the second heads are poor, they will be sold for pet food or dairy feed. Brewers rice is sold for pet food and dairy feed exclusively." and, despite having little nutritional value is found in approximately one third of pet food sold in the US.