Brand Overview

IAMS

IAMS has been around since 1946 and is one of the most recognized dog food brands in the world. Their flagship line, IAMS Proactive Health, targets everyday nutrition at an accessible price point and is widely available on Amazon.

Hills Science Diet

Hills Science Diet positions itself as the premium, vet-recommended option formulated with veterinary nutritionists. It comes at a noticeably higher price — but does the extra cost translate to better nutrition?

Ingredient Comparison

Protein Sources

IAMS Proactive Health lists chicken as the first ingredient, followed by chicken by-product meal. Hills Science Diet also leads with chicken, followed by whole grain wheat and whole grain corn, avoiding by-products entirely for a cleaner ingredient list.

Fat and Omega Content

Both formulas include chicken fat as a primary fat source. Hills edges ahead with added flaxseed for omega-3s, which supports brain function and reduces inflammation — especially important for senior dogs.

Nutritional Analysis

IAMS delivers higher protein (25%) at a lower price point, making it a solid value pick for active adult dogs. Hills offers a cleaner ingredient list and better omega-3 profile, ideal for dogs with sensitivities.

Price Comparison

IAMS Proactive Health (30 lb bag) runs roughly $40-$50 on Amazon. Hills Science Diet (30 lb bag) typically runs $75-$95 — nearly double the price. For most healthy adult dogs, the difference in formula does not justify nearly double the cost.

Which Should You Choose?

Choose IAMS if:

• You have a healthy adult dog with no known sensitivities
• You feed multiple dogs and budget matters
• Your dog is highly active and needs higher protein

Choose Hills Science Diet if:

• Your vet specifically recommended it
• Your dog has digestive sensitivities or skin issues
• You have a senior dog who benefits from the omega-3 boost

Our Verdict

For everyday nutrition, IAMS Proactive Health is the smart value choice — high protein, widely trusted, and easy on the wallet. If your dog has health challenges or your vet recommends it, Hills Science Diet is worth the premium.

Shop IAMS Proactive Health on Amazon

Shop Hills Science Diet on Amazon

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