The scores
Pedigree Complete Nutrition: D (37/100)
Purina ONE SmartBlend: C (58/100)
That's a 40-point difference — more than a full letter grade apart. Pedigree sits near the very bottom of every dog food we've analyzed. Purina ONE isn't premium, but it clears the bar that Pedigree can't.
How the ingredients compare
Here are the first five ingredients side by side — the ones that make up the bulk of each food:
Pedigree: Ground Whole Corn, Meat & Bone Meal, Corn Gluten Meal, Animal Fat (preserved with BHA/BHT), Chicken By-Product Meal
Purina ONE: Chicken, Rice Flour, Corn Protein Meal, Whole Grain Corn, Chicken By-Product Meal
The difference is visible immediately. Pedigree's number one ingredient is corn — a cheap filler that provides minimal nutritional value for dogs. You don't reach a named animal protein until ingredient five (chicken by-product meal). Purina ONE leads with chicken — a whole, named meat — at the top of the list. That single difference reshapes the entire nutritional profile of the food.
Where Purina ONE pulls ahead
Real protein first. Chicken as ingredient number one means a significantly higher proportion of quality animal protein. Pedigree buries its only named animal protein at position five.
No artificial colors. Pedigree contains four artificial dyes: Yellow 5, Red 40, Blue 2, and Yellow 6. These serve zero nutritional purpose and exist purely to make the kibble look more appealing to humans. Purina ONE doesn't use any of them.
No BHA/BHT. Pedigree's animal fat is preserved with BHA and BHT — artificial preservatives that BHA is classified as a possible carcinogen by the International Agency for Research on Cancer. Purina ONE avoids these entirely.
No unnamed protein sources. Pedigree uses "meat and bone meal" — a rendered, unspecified protein from unknown animal species. You literally don't know what animal it came from. Purina ONE's proteins are all named (chicken). Shop on Amazon →
Where Pedigree holds its own
Price. Pedigree is one of the cheapest dog foods on the market. If you're feeding a large dog and every dollar counts, Pedigree costs less per serving. That said, the price difference between Pedigree and Purina ONE is typically only a few dollars per bag — making the cost-per-point-of-quality-improvement remarkably low.
Availability. Both brands are widely available at grocery stores, big-box retailers, and online. Neither has an advantage here. Shop on Amazon →
The bottom line
This isn't a close call. Purina ONE scores 40 points higher than Pedigree, and the ingredient list tells you exactly why. Pedigree's corn-first formula, unnamed protein sources, artificial colors, and BHA/BHT preservatives put it at the very bottom of our rankings. Purina ONE isn't perfect — corn protein meal and chicken by-product meal keep it in C territory — but it's a dramatically better food for a small price increase.
If you're currently feeding Pedigree, switching to Purina ONE is the single most cost-effective upgrade available. Read our full reviews of Pedigree and Purina ONE for the complete ingredient breakdowns.