Dehulled soybean meal is the product obtained by grinding the flakes which remain after the removal of most of the oil and the outer covering of the soybean seed by a solvent or mechanical extraction process. (AAFCO, 2003) Soy protein is much harder to digest than meat, and is considered a cheap, poor quality protein filler. Soy is highly allergenic, causing problems for many animals and contains some enzyme inhibitors which impeded protein digestion. Most soy is also genetically modified (see GM), which makes its long term effects impossible to predict.