Allergen Detection Service Dogs are used by people with anaphylactic allergies so severe that they could go into anaphylactic shock just by touching trace amounts of a substance.  Although often referred to just as “peanut dogs,” these dogs can be used to detect any allergen.  Whether it is peanuts, tree nuts, milk, eggs, soy, wheat or any other substance, a highly trained detection dog can search the environment and alert to any residue that could cause its owner to go into anaphylaxis.