Kibbled corn consists of the dry product obtained by cooking cracked corn under steam pressure and extruding from an expeller or other mechanical pressure device. (AAFCO, 2003) Corn is considered highly allergenic for many pets, and is a cheap ingredient that is not recommended. Most corn is a genetically modified food, also making it undesirable. (See GM) Because corn lacks or is low in critical essential amino acids such as lysine, methionine, arginine and taurine, it is not a good source of protein. (Natura.com)