The ingredients list of those products will typically show several chemicals added as flavor enhancers and preservatives. (petbusiness.com)
Some dog food manufacturers incorporate a variety of flavor enhancers in their preparations to increase the palatability of the kibbles or even the wet dog food. (mypetneedsthat.com)
Monosodium glutamate (MSG) is a commonly used flavor enhancer with potent neurotoxic properties. (articles.mercola.com)