Hill's Prescription Diet k/d Kidney Care Dry Dog Food
- Veterinary Diet
- Veterinary Diet
- Bag
- 1
- More reviewed than 94%
A prescription-tier kidney support kibble worth using only under a vet's direction for a dog already diagnosed with kidney disease.
As an Amazon Associate, ProductDome may earn a commission from qualifying purchases made through links on this page.
How it ranks among the 50 veterinary diets we track
4.6★ across 2,000 Amazon ratings, Bayesian-smoothed toward the category average.
2,000 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
1,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 50 veterinary diets we track - how the scorecard works · full veterinary diets data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Hill's Prescription Diet k/d is a kidney support dry dog food in chicken flavor, sold in an 8.5 lb bag, built around the brand's ActivBiome+ Kidney Defense formulation and an appetite trigger system for dogs with reduced appetite from kidney disease.
This falls under Hill's Prescription Diet line, meaning it's formulated for dogs with a kidney condition diagnosed by a vet rather than as a general wellness food, and Hill's typically requires vet authorization to purchase these formulas.
- 8.5 lb bag
- Chicken flavor, dry kibble
- ActivBiome+ Kidney Defense formula
- Enhanced Appetite Trigger for reduced appetite
Who it's for
Dogs with vet-diagnosed kidney disease needing a controlled diet, particularly medium breed dogs based on the sizing on this bag. Not for healthy dogs without a kidney diagnosis, since restricted nutrient profiles aren't needed and can be counterproductive for normal kidney function.
Strengths and trade-offs
Drawn from this product's published specifications.
- Formulated specifically for kidney support with an appetite trigger for dogs eating less
- Chicken flavor may help appetite in dogs going off food
- 8.5 lb bag size manageable for smaller households
- Prescription diet, likely requires vet authorization to purchase
- Not appropriate for dogs without a kidney diagnosis
Performance notes
The Enhanced Appetite Trigger addresses a common problem in kidney disease, reduced appetite, while the kidney defense formulation is built around the nutrient restrictions, typically lower phosphorus and protein, that vets use to slow kidney disease progression.
Specifications
| Brand | Hill's |
|---|---|
| Model | 8621 |
| Dimensions & fit | |
| Item Weight | 8.5 pounds |
| Dog Breed Size | Medium |
| Capacity & performance | |
| Age Range Description | Adult |
| Included components | |
| Unit Count | 8.5 pounds |
| Included Components | adult-dog-food |
| Other details | |
| Animal Food Diet Type | Veterinary Diet |
| Container Type | Bag |
| Number Of Items | 1 |
| Manufacturer | Hill's Pet Nutrition |
| Manufacturer Part Number | 8621 |
| Model Number | 8621 |
| Specific Uses For Product | Kidney Care |
| Occasion | Birthday |
| Target Species | Dog |
| Product Benefits | Supports kidney health and maintains muscle mass |
| Upc | 052742862101 |
| Customer Reviews | {'ratings_count': '2,093', 'stars': '4.6'} |
| Additional Features | ActivBiome+ Kidney Defense, Enhanced Appetite Trigger (E.A.T) |
| Breed Recommendation | All Breed Sizes |
| Recommended Uses For Product | Kidney Care |
| Allergen Information | Chicken Meat |
| Item Form | Dry Food |
| Asin | B0050JL2EO |
| Special Ingredients | holistic |
| Best Sellers Rank | #4,682 in Pet Supplies (See Top 100 in Pet Supplies) #7 in Veterinary Diet Dog Food #313 in Dry Dog Food |
| Flavor | Chicken |
| Item Type Name | k/d Kidney Care with Chicken Dry Dog Food |
Other Hill's veterinary diets
How it compares
This product against the closest alternatives we track in veterinary diets.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Hill's Prescription Diet k/d Kidney Care Dry Dog FoodThis product | 4.6 / 5 | 2,000 | 4.4 / 5 |
| Pro Plan Veterinary Diets Purina UR Urinary Ox/St Canine Formula Dog Food Dry KibblePro Plan Veterinary Diets | 4.6 / 5 | 453 | 4.1 / 5 |
| Royal Canin Veterinary Diet Canine Hepatic Adult Dry Dog FoodROYAL | 4.7 / 5 | 538 | 4.1 / 5 |
| Purina Pro Plan Veterinary Diets HA Hydrolyzed Protein Dog Food Dry Vegetarian FormulaPurina | 4.4 / 5 | 221 | 4.0 / 5 |
| Blue Buffalo Natural Veterinary Diet W+U Weight Management + Urinary Care Dry Dog FoodBlue | 4.6 / 5 | 179 | 3.9 / 5 |
Similar veterinary diets from other brands
Questions about the Hill's 8621
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Do I need a prescription to buy this food?
It's part of Hill's Prescription Diet line, formulated for vet-diagnosed kidney conditions, so check whether the seller requires vet authorization.
What size bag is this?
8.5 lb.
Is this suitable for a healthy dog without kidney issues?
No, it's a therapeutic diet meant for dogs with diagnosed kidney disease, not general wellness feeding.