Hill's Science Diet Adult Perfect Digestion Chicken, Brown Rice & Whole Oats, Small Kibble, 12 lb
A chicken first adult kibble aimed at digestion, in a smaller kibble, priced above many dry foods.
The short version
- Healthy adult dogs aged 1 to 6
- Small and medium dogs that prefer smaller kibble
- Owners hoping for more regular stools from an everyday food
- Your dog does poorly on chicken or corn
- You want a grain free food
- Your dog is a puppy, over 7, or pregnant or nursing
What owners like
- Firmer, more regular stools reported within days to weeks
- Most dogs eat it readily, including some picky eaters
- Gentle for dogs that did poorly on other foods
Common complaints
- Costs more than many standard dry foods
- Not every dog improves, and some have upset stomachs during the switch
- Some dogs eat it reluctantly
- Kibble size can be inconsistent, with a few larger pieces that small dogs struggle with
Based on Hill's product page, an independent review on The Pet Dude, and review themes on PetSmart's listing.
Research scores
Scored from the maker's specs and what owners report. Drew's own notes and photos will refine these.
Ownership
- Apr 2026
Bought again.
- Dec 2025
First bought.
Drew's hands-on notes for this product are on the way. Long-term updates will be added to this timeline.
What it does
A dry dog food for adult dogs built around a prebiotic fiber blend, with chicken, barley, brown rice and whole oats; the linked listing is the 12 lb small kibble bag, and the same recipe is sold in 22 lb bags.
- ActivBiome+ Digestion, which Hill's describes as its own blend of prebiotic fibers
- Chicken is the first ingredient
- Includes pumpkin and whole grain oats, per the ingredient list
- No artificial flavors, colors or preservatives, according to the maker
- Smaller kibble than the standard bag, easier for small dogs to chew
Worth a look for healthy adult dogs whose owners want a chicken first kibble aimed at digestion, and the small kibble suits smaller mouths. Retailer reviews often report firmer stools after the switch, but it costs more than many dry foods and some dogs show no change.
How it compares
Specs
- Bag sizes
- 3.5 lb, 12 lb and 22 lb
- Life stage
- Adult dogs, 1 to 6 years
- Kibble
- Small kibble (Small Bites) version of the recipe
- Calories
- 368 kcal per cup (3,607 kcal/kg) for the standard kibble; check the bag for the small kibble figure
- Protein (dry matter)
- 25.1%
- Fat (dry matter)
- 14.3%
- First ingredients
- Chicken, cracked pearled barley, brown rice, brewers rice, whole grain oats, whole grain corn
Worth knowing
- Hill's does not recommend it for puppies, dogs 7 and older, or pregnant or nursing dogs.
- Contains chicken, corn and other grains.
Questions
Is this the same food as the 22 lb Perfect Digestion bag?
Same recipe and ingredient list. The listing here is the small kibble version in a 12 lb bag.
Is Perfect Digestion Chicken & Barley the same food?
Hill's product page now names the standard kibble Chicken & Barley Recipe, with the same leading ingredients: chicken, barley, brown rice, brewers rice and whole grain oats.
What is ActivBiome+?
Hill's name for the blend of prebiotic fibers in the recipe.
What age is it for?
Adult dogs aged 1 to 6. Hill's sells a separate Adult 7+ Perfect Digestion recipe.
Sources
- Hill's Pet: Science Diet Adult Perfect Digestion Chicken & Barley Recipe
- PetSmart: Hill's Science Diet Perfect Digestion Adult Dry Dog Food, Chicken & Brown Rice
- The Pet Dude: Hill's Science Diet Perfect Digestion Review
- Chow Hound Pet Supplies: Science Diet Adult Perfect Digestion Chicken, Brown Rice & Whole Oats
Researched 2026-10-01. We bought this product; our page is built from the maker's details and what owners report across reviews and forums. We never copy Amazon customer reviews.