Hill's

Hill's Science Diet Adult

Ranked #1 in Dog Food

1030 LP on the category ladder what's LP?

The most clinically backed food on the board, with decades of feeding trials behind a stable formula. Slightly less palatable to some dogs, which is the only thing keeping it from first.

Consolidated from 11 cited sources across 9 outlets

Where the cited sources landed, as we read them

6 positive sources
3 mixed sources
1 unconvinced source

See the sources

Flagged as a product to avoid

1 of 12 research runs entered this as a product to avoid rather than a pick.

Coasts on vet-desk reputation: Dog Food Advisor averages just 3 stars across the adult dry range, ConsumerAffairs readers call it overpriced and report digestive upset, and Petful scores the flagship recipe a middling 7.8 out of 10. Purina Pro Plan Sensitive Skin & Stomach delivers better nutrition per dollar.
Flagged 22 September 2026

Why the boards include products to avoid

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Pros & cons

✓ top tier of vet-recommended foods
✓ decades of clinical feeding trials
✓ in-house veterinary nutrition team
✓ Vet-backed formulation
✓ Sits in the middle of the price range rather than the top

✗ Less ingredient glamour than trendier brands
✗ Dog Food Advisor rates the adult dry range a mediocre 3 stars on average across 48 recipes
✗ Customer reviewers call the brand overpriced
✗ Digestive upset reported in customer reviews
✗ The flagship Adult Chicken and Barley recipe scores a middling 7.8 out of 10, not exceptional

The sources behind this ranking

We searched the web and YouTube for what has been published about this product, then read the articles, video transcripts and comments we found. 10 of these 11 links were working when we checked.

Evidence 8 articles and 3 video reviews

6 positive sources

Petful Article · Jul 2026

Hill's Science Diet Adult Chicken & Barley is substantiated this way: the bag's AAFCO statement reads that "animal feeding tests using AAFCO procedures substantiate" that the recipe provides complete and balanced nutrition for adult maintenance ( Hill's Science Diet Adult Chicken & Barley product page ).

Read P Petsacular Petsacular · 1.2K subscribers · Dec 2024

Hill's Science Diet Adult Sensitive Stomach and Skin Chicken Recipe Dry Dog Food is an excellent choice for dogs with digestive or skin sensitivities. It's high-quality ingredients and thoughtful formula make it a great option if you're willing to invest a little more in your dog's health. If you're on a tighter budget, there are cheaper alternatives that still provide similar benefits. But overall, this product does what it promises, supporting digestion, skin, and coat health while delivering the nutrients your dog needs.

Watch D

Dog Food Advisor Mike Sagman · reviewer · Dec 2009

Hill’s Science Diet Puppy Food product range consists of eight recipes with ratings varying from 3.5 to 4 stars . The average rating of the whole range is 4 stars .

Read P Petsacular Petsacular · 1.2K subscribers · Oct 2025

Comparing this product to similar offerings on the market, Hills Science Diet stands out due to its veterinarian recommendation and the inclusion of omega6 fatty acids and vitamin E for skin and coat health. While other brands may offer similar formulations, Hill's long-standing reputation and commitment to quality make it a reliable choice for many pet owners.

Watch B

Business Insider Janelle Leeson, Sorin McKnight · reviewer · Sept 2026

Hill’s Science Diet Adult Beef and Barley Entree balances palatability and nutrition with real beef liver and chicken liver flavoring.

Read D DogtorWalker DogtorWalker · 283 subscribers · Feb 2026

Now when we come over to the Hill's Science Diet, Um, can see that the AAFCO statement, again, they do feeding trials, which is amazing, and we do have um, a specific life stage for maintenance of adult dogs. And again, we know that this is a grain-inclusive diet because in the title it says it is a chicken and barley formula. Now, the protein we can see here is at 23.8, which again is right below um, where it should be, at below 30%. The fat is at 15%, again, right where it should be, below 20 um, on a dry matter basis.

Watch

3 mixed sources

Cats.com Cats.com · reviewer · May 2019

Like the previous formula, and many Hill’s Science Diet recipes, this dry food relies primarily on animal-sourced protein and fat but still contains a significant amount of starchy carbohydrate. Chicken muscle meat is the primary ingredient, supplemented with additional protein from chicken meal and egg product. It’s likely that the corn gluten meal and whole grain corn contribute to the food’s 32.2% dry matter protein content, but it’s hard to say how much. Overall, this recipe appears to be a hit with cats and their owners. Numerous customers comment that the smaller-than-average kibbles are easy for their cats to eat and many owners of picky cats say this recipe is a feline favorite.

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My Norwegian Cat Article · Jul 2026

Is Hill’s Science Diet Indoor good for a Norwegian Forest Cat? The short answer from this hills science diet indoor cat food review: it’s a solid, safe, well-researched general food — good for a healthy adult NFC with no hairball or weight-management needs. It is not engineered for the breed’s specific coat and jaw characteristics the way Royal Canin’s NFC formula is. Does this food help with NFC hairballs? As this hills science diet indoor cat food review found, it contains general fiber for digestive support but no hairball-specific fiber system (like psyllium). NFC owners managing frequent hairballs typically see better results from a formula engineered specifically for hair transit.

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Dog Food Advisor Mike Sagman · reviewer · Dec 2009

Hill’s Science Diet Adult dry product range is made up of 48 recipes with ratings varying from 1 to 3.5 stars . The average rating of the whole range is 3 stars .

Read

1 unconvinced source

Jess Caticles Jess and Jericho · reviewer · Oct 2020

Well, Colgate-Palmolive uses the same clever marketing to sell Hill’s Science Diet cat food. It says it right on the label: veterinarian recommended.

Read

1 stance not read source

P PetMD Article Read

Frequently asked questions

It ranks #1 of 12 on our dog food tier list, in S tier. That placement draws on 11 cited sources across 9 outlets.

1 of the 10 sources with a clear view is critical of it: Jess Caticles. Less ingredient glamour than trendier brands. Dog Food Advisor rates the adult dry range a mediocre 3 stars on average across 48 recipes. Customer reviewers call the brand overpriced. Digestive upset reported in customer reviews. The flagship Adult Chicken and Barley recipe scores a middling 7.8 out of 10, not exceptional.