Best Hill’s Science Diet Dog Food: Reviews & Top Picks

Here is a complete Hill’s Pet Nutrition for dogs, one of the best-selling and most trusting dry dog foods on the market.

As often the US #1 Veterinarian Recommended brand, Hill’s is proud for delivering food for dogs that are backed by science to help dog owners be the best dog parents possible.

Hill’s is founded in Topeka, Kansas in the 1960s, and ever since they are continually perfecting their products to deliver the best food for dogs of not only different ages, and sizes, but nutritional needs as well.

Today we will focus on their most dry food selection, including grain-free variants, the best food for overweight dogs, and even the best food for oral care.

Hill’s Science pay close attention to food safety, which is why their food passed all inspection, even including those on the European ground.

In the United Kingdom, Hill’s is known as Science Diet. Regardless the name their quality remains, as it offers the right balance of nutrients to help maintain health in dogs.

A quick look at the best Hill’s Science Diet formulas

How we chose

Because choosing the right food for your dog can be confusing and overwhelming, we reviewed all Hill’s Science dog foods.

Every product on our list has been vetted to ensure that it aligns with Barking Royalty’s brand integrity standards and approach to well-being. Each product in this article:

  • adheres to allowable health claims and labeling requirements
  • is manufactured in facilities that adhere to current good manufacturing practices (CGMPs)
  • is produced by a medically credible company that follows ethical, legal, and industry best standards
  • is made by a company that provides objective measures of trust

Additional factors we considered included:

  • Ingredients. We looked for supplements that are free of unnecessary ingredients such as fillers and artificial
  • sweeteners and colors.
  • AAFCO Dog Food Nutrient Profile. We checked if the food meets the nutritional levels established by the AAFCO.
  • Price. We included products to suit a range of budgets.

Barking Royalty’s picks for the best Diamond Naturals dry foods

Best all life stages

Hill’s Science Diet Adult Perfect Weight Chicken

  • Price: $$
  • Energy: 3191 kcal/kg (299 kcal/cup)
  • AAFCO Profile: Adult Dog Food
  • Grain-free: Yes
Crude Protein 24.0% min
Crude Fat 9.0% min
Crude Fiber 5.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acidsnot disclosed
Omega-6 To Omega-3 Rationot disclosed

The first ingredient in this formula is chicken for great taste and nutrition, followed by cracked pearled barley, brown rice, pea fiber, and corn gluten meal.

This formula is carefully created to support a dog’s healthy weight and muscle maintenance.

Hill’s Science Diet Adult Perfect Weight Chicken is packed with natural ingredients, vitamins, and minerals.

Next to this great addition, Hill’s Science Diet Adult Perfect Weight Chicken is enriched with amino acids that enable shiny coats and skin.

Hill’s Science Diet Adult Perfect Weight Chicken is supported with coconut oil, oat fiber, apples, broccoli, green peas, and dried beet pulp to provide enough fiber and support gut health in dogs.

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Best for adults

Hill’s Science Diet Adult Chicken & Barley

  • Price: $$
  • Energy: 363 kcal/8-oz cup
  • AAFCO Profile: Adult Dog Food
  • Grain-free: No
Crude Protein 20.0% min
Crude Fat 11.5% min
Crude Fiber 4.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids2.5%
Omega-6 To Omega-3 Rationot disclosed

Hill’s Science Diet Adult Chicken & Barley is made of fresh chicken for full taste and protein-based nutrition, followed by, cracked pearled barley, whole grain wheat, whole grain corn, and whole grain sorghum.

For a richer taste, this formula is enriched with soybean meal, chicken fat, and brewer rice.

Besides these superfoods, Hill’s Science Diet Adult Chicken & Barley formula contains fibers from broccoli, carrots, cranberries, and green peas.

It also contains omega-6 fatty acids and vitamin E next to other nutrients that nourish the skin and can make a dog’s coat shiny in a period of 30 days.

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Best for large breed adults

Hill’s Science Diet Adult Large Breed

  • Price: $$
  • Energy: 363 kcal/8-oz cup
  • AAFCO Profile: Adult Large Breed Dog Food
  • Grain-free: No
Crude Protein 20.0% min
Crude Fat 11.5% min
Crude Fiber 4.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids2.5%
Omega-6 To Omega-3 Rationot disclosed

The first ingredient in this formula is chicken as a great source of energy and amino acids in dogs, followed by cracked pearled barley, whole grain wheat, whole grain corn, and whole grain sorghum.

For richer taste and stronger flavor, this formula is enriched with soybean meal, chicken fat, brewers rice, and chicken liver flavor.

This formula is supported by some superfoods such as apples, broccoli, carrots, cranberries, and green peas.

These superfoods are great for providing rich taste and enabling great gut health in dogs.

Besides these superfoods, Hill’s Science Diet Adult Large Breed offers omega-6 fatty acids that nourish skin and promote a shiny coat.

For strong immunity and overall good health in dogs, this formula comes with a clinically proven antioxidant blend including vitamins C and E.

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Best for small breed adults

Hill’s Science Diet Adult Small Bites Chicken & Barley

  • Price: $$
  • Energy: 363 kcal/8-oz cup
  • AAFCO Profile: Adult Small Size Dog Food
  • Grain-free: No
Crude Protein 20.0% min
Crude Fat 11.5% min
Crude Fiber 4.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids2.5%
Omega-6 To Omega-3 Rationot disclosed

Chicken is the first ingredient in this formula, followed by cracked pearled barley, whole grain wheat, whole grain corn, and whole grain sorghum.

This formula is enhanced with superfoods such as broccoli, carrots, apples, cranberries, and green peas.

For richer bites, this formula is enriched with soybean meal, chicken fat, brewers rice, dried beet pulp, and oat fiber.

To deliver freshness, this formula contains mixed tocopherols. Hill’s Science Diet Adult Small Bites Chicken & Barley formula is natural and highly digestible, with high-quality protein that supports lean muscles and a healthy immune system.

Thanks to high-quality fibers, antioxidants, and fatty acids, this formula perfectly supports healthy digestion in small breed adult dogs.

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Best for large breed puppies

Hill’s Science Diet Puppy Large Breed Chicken Meal & Oat

  • Price: $$
  • Energy: 394 kcal/cup
  • AAFCO Profile: Puppy Large Breed Food
  • Grain-free: No
Crude Protein 24.0% min
Crude Fat 11.0% min
Crude Fiber 3.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids2.5%
Omega-6 To Omega-3 Rationot disclosed

The first ingredient in this formula is chicken for a richer taste, better nutrition, and more interesting flavor, followed by whole grain wheat, whole grain oats, whole grain sorghum, and corn gluten meal.

This formula is enhanced with superfoods such as apples, broccoli, carrots, cranberries, and green peas.

These foods are great sources of antioxidants, vitamins, minerals, fatty acids, and proteins – ingredients that every puppy will benefit from.

To enable proper fiber consumption, this formula is supported with oat fiber and natural flavors for a more diverse taste.

It also contains proper calcium levels for bone growth and vitamin E and C for strong muscles and joint health.

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Best for seniors

Hill’s Science Diet Adult 7+ Chicken Meal

  • Price: $$
  • Energy: 353 kcal/8-oz cup
  • AAFCO Profile: Adult 7+ Dog Food
  • Grain-free: No
Crude Protein 15.5% min
Crude Fat 10.5% min
Crude Fiber 4.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids2.5%
Omega-6 To Omega-3 Rationot disclosed

The first ingredient in this formula is chicken, followed by rice and barley.

For richer taste and better bites, this formula relies on a savory chicken meal to provide a balanced meal that your dog needs and restore youthful energy.

Hill’s Science Diet Adult 7+ Chicken Meal is a carefully designed formula to meet the needs of mature dogs of 7 years and older.

Thanks to its superfoods, such as broccoli, carrots, and green peas, this formula promotes vitality in just 30 days.

It also contains omega-6 fatty acids that directly influence healthier and noticeably stronger skin and shiny coats.

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Best grain-free

Hill’s Science Diet Adult Sensitive Stomach & Skin Grain-Free Chicken & Potato

  • Price: $$
  • Energy: 405 kcal/cup
  • AAFCO Profile: Adult Dog Food
  • Grain-free: Yes
Crude Protein 20.5% min
Crude Fat 13.0% min
Crude Fiber 4.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids3.0%
Omega-6 To Omega-3 Rationot disclosed

The first ingredient in this formula is chicken for great taste, stronger bite, and great source, followed by yellow peas, potatoes, potato starch, and chicken fat.

For richer taste and more flavor, this formula contains chicken fat, chicken liver flavor, pork flavor, and egg product.

This formula is enhanced with dried beet pulp, soybean oil, and broccoli. Thanks to beet pulp this formula is a true nourishing prebiotic fiber supporting a dog’s gut health.

Thanks to omega-6 fatty acids this formula not only that it supports sensitive digestion, but supports healthy skin and coat in dogs.

Since this formula is grain-free it is made with highly natural ingredients, packed with vitamins, minerals, and fatty aids that are great for healthy skin and a radiant coat.

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Best for overweight dogs

Hill’s Science Diet Adult Large Breed Light With Chicken Meal & Barley

  • Price: $$
  • Energy: 2987 kcal/kg (271 kcal/cup†)
  • AAFCO Profile: Adult Dog Light Food
  • Grain-free: No
Crude Protein 25.3% min
Crude Fat 8.4% min
Crude Fiber 12.3% min
Moisture 10.5% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids1.5%
Omega-6 To Omega-3 Rationot disclosed

The first ingredient in this formula is chicken for better texture and richer taste, followed by cracked pearled barley, pea fiber, whole grain wheat, and whole grain corn.

This formula is enhanced with superfoods such as apples, broccoli, carrots, cranberries, and green peas.

These foods are great sources of antioxidants, vitamins, minerals, fatty acids, and proteins all of that dogs can benefit from.

Besides these superfoods, Hill’s Science Diet Adult Large Breed Light With Chicken Meal & Barley contains additional vitamins, minerals, and supplements that are supported by oat fiber, pork flavor, and soybean oil. This formula contains fibers from dried beet pulp making the dog’s gut stronger.

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Best for stomach and skin

Hill’s Science Diet Adult Sensitive Stomach & Skin Chicken & Barley

  • Price: $$
  • Energy: 394 kcal/cup
  • AAFCO Profile: Adult Sensitive Stomach Dog Food
  • Grain-free: No
Crude Protein 20.0% min
Crude Fat 13.0% min
Crude Fiber 4.0% min
Moisture 10.0% max
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acids2.5%
Omega-6 To Omega-3 Rationot disclosed

This formula is crafted with chicken as the first ingredient, followed by yellow peas, cracked pearled barley, brown rice, and brewers rice. This formula provides the best for sensitive digestion with grain and vitamins and minerals that support the dog’s overall health.

Hill’s Science Diet Adult Sensitive Stomach & Skin Chicken & Barley is highly digestible to support optimal nutrient absorption and healthy digestion.

This formula contains vitamin E and omega-6 fatty acids to support healthy skin and coat.

Besides these superfoods, this formula contains fibers from beet pulp which serves as a nourishing prebiotic fiber.

It also contains prebiotic fiber to fuel beneficial gut bacteria and support a balanced microbiome.

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Best for oral care

Hill’s Science Diet Adult Oral Care

  • Price: $$
  • Energy: 275 kcal/cup
  • AAFCO Profile: Adult Oral Care Food
  • Grain-free: No
Crude Protein 20.0% min
Crude Fat 13.0% min
Crude Fiber 12.0% min
Moisture not disclosed
Omega-3 Fatty Acidsnot disclosed
Omega-6 Fatty Acidsnot disclosed
Omega-6 To Omega-3 Rationot disclosed

The first ingredient in this formula is chicken, followed by whole grain wheat, powdered cellulose, brown rice, and chicken fat.

For extra flavor, this formula contains barley, chicken liver, corn, soybean oil, and fish oil.

These ingredients are packed with minerals and vitamins that can not only positively affect a dog’s oral health but can also make skin and coat stronger and healthier.

Hill’s Science Diet Adult Oral Care is a result of specific fiber technology that helps to clean teeth and freshen breath as your dog chews.

Not only that it helps clean the space between the teeth, but also prevents additional plaque and tartar buildup to support whole-body health.

This formula comes with antioxidants and vitamins E and C that are blended together to support a healthy immune system.

Hill’s Science Diet Adult Oral Care is made from natural and high-quality ingredients that are free of any type of artificial colors, flavors, or preservatives.

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