Young Again ZERO vs. IAMS Proactive Health High Protein

Young Again has a better protein to fat ratio. However, IAMS's ratio is not bad. (The ideal ratio is 2 to 1.) Young Again has fewer ingredients, which is usually a good thing. Young Again has a slightly lower concentration of fruits, veggies, grains, and starches. Both foods are pea-free. Young Again contains controversial ingredients.

Young Again ZERO

Young Again has a better protein to fat ratio. However, IAMS's ratio is not bad. (The ideal ratio is 2 to 1.)
Young Again has fewer ingredients, which is usually a good thing.
Young Again has a slightly lower concentration of fruits, veggies, grains, and starches.

Legend

First 10 ingredients:

hydrolyzed pork chicken meal chicken fat chicken liver flavor guar gum herring meal dl methionine l-lysine fish oil psyllium husk

IAMS Proactive Health High Protein

Young Again contains controversial ingredients.

First 10 ingredients:

chicken chicken byproduct meal corn grits ground whole grain corn salmon chicken meal dried plain beet pulp natural flavor sodium bisulfate caramel color