Pentobarbital is used for anesthesia and euthanasia. Following reports that it was losing its potency when used on dogs, the FDA looked into the possibility it was entering pet food and allowing dogs to build resistance to it. Well, they found traces of it, sure enough, and now the question is: where did it come from?
The simplest theory: euthanized pets. While FDA decided in their 2002 report that cats and dogs were not being slipped into Kibbles'n'bits, it is still possible that any animal that has been "put down" will make it into the rendering tanks, and from there to pet food manufacturers. FDA reassures us that the pentobarbital levels present in some pet foods are too low to do have any lasting effect. The drug residue probably comes from euthanized cattle and swine, not household pets. The problem is that FDA does not regulate the pet food industry as rigorously as food meant for human consumption, so what is really in a bag of dog chow could still be aptly renamed, "mystery meat".


