Purina ONE still offers the same great SmartBlend of nutrition in our teal and red bags of pet food. We simply removed the term “SmartBlend” from the front of the bag when we redesigned our packages.

They look the same and have the same ingredients so what exactly is the difference other than the cost? They don't have the same exact ingredients. The tender selects has corn gluten meal for one, which is an ingredient I refuse to feed my cats. The true instinct does not have any corn products.

Recommended by Veterinarians The advanced nutrition of Purina Pro Plan is a trusted choice of experts and veterinarians all across the country.

Veterinarians recommend Purina pet food because Purina has spent nearly a century researching pet nutrition and using our vast expertise in pet health to develop dog and cat foods and other pet care products to help them live longer, healthier lives.

The Dog Food Advisor finds Purina Pro Plan to be an above-average kibble. Each grain-inclusive recipe uses a moderate amount of named meat and by-product meals as its primary source of animal protein, thus earning the brand 4 stars. Pro Plan Bright Mind gets 4.5 stars. Highly recommended.

Purina Dog Chow Natural Dog Food receives the Advisor's second-highest tier rating of 4 stars.

The Dog Food Advisor finds Purina Pro Plan to be an above-average kibble. Each grain-inclusive recipe uses a moderate amount of named meat and by-product meals as its primary source of animal protein, thus earning the brand 4 stars. Pro Plan Bright Mind gets 4.5 stars. Highly recommended.

Purina One is a grain-inclusive dry dog food using at least a moderate amount of named meat meal and named by-product meal as its dominant source of animal protein, thus earning the product line 3.5 stars. Recommended.

Recommended by Veterinarians The advanced nutrition of Purina Pro Plan is a trusted choice of experts and veterinarians all across the country.

All of the brands also offer high-calorie options for puppies and easily digestible kibble sizes for various sized dogs.

• Best overall dry dog food: Royal Canin.
• Best subscription dog food: The Farmer's Dog.
• Best dog food for puppies: Hill's Science Diet.
• Best dog food for large breeds: Purina.

Veterinarians recommend Purina pet food because Purina has spent nearly a century researching pet nutrition and using our vast expertise in pet health to develop dog and cat foods and other pet care products to help them live longer, healthier lives.

Purina ONE is a quality choice for dogs who need help managing their weight. However, if pet owners want to add probiotics and more natural ingredients to their dog's diet, a slightly pricier alternative is available from Purina, Purina Pro Plan Weight Management.