Fig. 1

Proportions of pet foods with added mislabeled ingredients and those with missing ingredients from the label. The percentage of diets with added mislabeled ingredients are in red, those with missing ingredients from the label are in blue. Dotted lines represent the respective medians. Bolded and squared numbers represent studies with foods with “novel”, “limited” or hydrolyzed ingredients that had been selected because of their proposed used for elimination diets. The infinite symbols represent the studies using mass spectrometry that, theoretically, should allow for the detection of an infinite number of contaminating proteins