Best Kidney Supplements for Cats 2026: According to Reviews | Chewy

Best Kidney Supplements for Cats

How we created this kidney supplement list

We leveraged input from our veterinarians and artificial intelligence to identify key considerations to help you find the best kidney supplements for cat.
We scanned thousands of customer reviews and ratings and scored each product based on its performance against each of the key considerations. We then considered how popular a product is with Chewy customers and combined that with its key consideration scores to create the list of the best kidney supplements for cats.

Key kidney supplement considerations

Effectiveness in Reducing Kidney Disease Symptoms

Palatability and Ease of Consumption

Ingredient Quality and Potency

Digestive Tolerance and Side Effects

Our Top Picks

1
Vetoquinol Renal K+ Gel Kidney Supplement for Cats & Dogs, 5-oz tube
Vetoquinol Renal K+ Gel Kidney Supplement for Cats & Dogs, 5-oz tube
Vetoquinol Renal K+ Gel Kidney Supplement for Cats & Dogs, 5-oz tube
Vetoquinol Renal K+ Gel Kidney Supplement for Cats & Dogs, 5-oz tube
Vetoquinol Renal K+ Gel Kidney Supplement for Cats & Dogs, 5-oz tube

Vetoquinol Renal K+ Gel Kidney Supplement for Cats & Dogs, 5-oz tube

Rated 4.4 out of 5 stars
562
$27.48 Chewy Price
($5.50/oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.4/5
Great

Palatability and Ease of Consumption

4.2/5
Great

Ingredient Quality and Potency

4.3/5
Great

Digestive Tolerance and Side Effects

4.0/5
Great

Is this kidney supplement right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Purified Water, Potassium Gluconate, Sodium Carboxymethylcellulose, Potassium Sorbate, Sodium Benzoate

Food Flavor

Unflavored
2
AminAvast Kidney Support Cats & Small Dogs Supplement, 60 count
AminAvast Kidney Support Cats & Small Dogs Supplement, 60 count
AminAvast Kidney Support Cats & Small Dogs Supplement, 60 count
AminAvast Kidney Support Cats & Small Dogs Supplement, 60 count

AminAvast Kidney Support Cats & Small Dogs Supplement, 60 count

Rated 4.5 out of 5 stars
513
$37.00 Chewy Price
($0.62/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.4/5
Great

Palatability and Ease of Consumption

4.4/5
Great

Ingredient Quality and Potency

4.4/5
Great

Digestive Tolerance and Side Effects

4.3/5
Great

Is this kidney supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Active Ingredients: AB070597* (Glycine, L-Aspartic acid, L-Glutamic acid, L-Glutamine, L-Carnosine

Food Flavor

Unflavored

Packaging Type

Bottle
3
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count
Porus One Kidney Powder Supplement for Cats, 30 count

Porus One Kidney Powder Supplement for Cats, 30 count

Rated 4.6 out of 5 stars
214
$63.95 Chewy Price
($2.14/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.2/5
Great

Palatability and Ease of Consumption

4.3/5
Great

Ingredient Quality and Potency

4.2/5
Great

Digestive Tolerance and Side Effects

4.3/5
Great

Is this kidney supplement right for my pet?

Special Diet

Odor-Free

Packaging Type

Pouch
4
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count
Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count

Virbac Nephrodyl Synbiotic Capsules for Kidney Support for Dogs & Cats, 60 count

Rated 4.6 out of 5 stars
164
$68.69 Chewy Price
($1.15/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.0/5
Great

Palatability and Ease of Consumption

4.1/5
Great

Ingredient Quality and Potency

4.3/5
Great

Digestive Tolerance and Side Effects

3.9/5
Good

Is this kidney supplement right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

**Inactive Ingredients:** Magnesium Stearate, Vegetable Capsule (Gellan Gum, Hypromellose)

Packaging Type

Tub
5
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle
Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle

Liquid-Vet Kidney & Bladder Support Chicken Flavor Cat Supplement, 8-fl oz bottle

Rated 4 out of 5 stars
125
$12.87 Chewy Price
($1.61/fl oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.5/5
Great

Palatability and Ease of Consumption

4.3/5
Great

Ingredient Quality and Potency

4.7/5
Excellent

Digestive Tolerance and Side Effects

4.2/5
Great

Is this kidney supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Active Ingredients: A Proprietary Blend of Cranberry Extract, Glucosamine Sulfate, D-Mannose, Potassium Citrate, Sodium Citrate

Special Diet

Natural, Organic, Grain-Free, Human-Grade...

Food Flavor

Chicken, Poultry
6
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count
Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count

Pet Health Pharma Azovast Plus Capsule Kidney Supplement for Dogs & Cats, 120 count

Rated 4.4 out of 5 stars
101
$59.79 Chewy Price
($0.50/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

3.9/5
Good

Palatability and Ease of Consumption

4.0/5
Great

Ingredient Quality and Potency

4.0/5
Great

Digestive Tolerance and Side Effects

4.1/5
Great

Is this kidney supplement right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Active Indredients: S. thermophilus, L. acidophilus, B. longum, L.casei

Health Feature

Kidney Care
7
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle
Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle

Animal Nutritional Products UroMAXX Urinary, Kidney & Bladder Dog & Cat Supplement, 6-fl oz bottle

Rated 4.4 out of 5 stars
214
$28.95 Chewy Price
($4.83/fl oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.2/5
Great

Palatability and Ease of Consumption

4.1/5
Great

Ingredient Quality and Potency

4.2/5
Great

Digestive Tolerance and Side Effects

4.0/5
Great

Is this kidney supplement right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Active Ingredients: Cranberry Juice Extract, Glucosamine as HCL, Vitamin C, Herbal Extract and Amino Acid Support., Inactive Ingredients: Glycerin

Special Diet

Grain-Free
8
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle
Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle

Earth Animal Apothecary Urinary & Kidney Relief Herbal Liquid Supplement for Dogs & Cats, 2-fl oz bottle

Rated 4.7 out of 5 stars
56
$20.99 Chewy Price
($10.50/fl oz)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.4/5
Great

Palatability and Ease of Consumption

4.6/5
Excellent

Ingredient Quality and Potency

4.6/5
Excellent

Digestive Tolerance and Side Effects

4.3/5
Great

Is this kidney supplement right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Active Ingredients per 20 drops (1 ml): Proprietary Urinary & Kidney Relief Herbal Blend: (Uva Ursi, Couch Grass, Gravel Root, Yarrow, Cleavers

Special Diet

Natural, Human-Grade, Non-GMO, Vegan...
9
HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL
HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL
HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL
HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL
HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL
HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL
HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL

HomeoPet Feline Kidney Rescue Liquid Supplement for Cats, 15-mL

Rated 4.4 out of 5 stars
36
$19.49 Chewy Price
($1.30/mL)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.5/5
Great

Palatability and Ease of Consumption

4.5/5
Great

Ingredient Quality and Potency

4.4/5
Great

Digestive Tolerance and Side Effects

4.4/5
Great

Is this kidney supplement right for my pet?

Lifestage

All Lifestages

Top Ingredients

Alcohol, Water, Glycerin

Packaging Type

Bag
10
Catney One Kidney Powder Supplement for Cats, 30 count
Catney One Kidney Powder Supplement for Cats, 30 count
Catney One Kidney Powder Supplement for Cats, 30 count
Catney One Kidney Powder Supplement for Cats, 30 count
Catney One Kidney Powder Supplement for Cats, 30 count
Catney One Kidney Powder Supplement for Cats, 30 count
Catney One Kidney Powder Supplement for Cats, 30 count

Catney One Kidney Powder Supplement for Cats, 30 count

Rated 4.1 out of 5 stars
47
$63.95 Chewy Price
($2.14/ea)
Promo, New Customers Only: Spend $49+, get $20 eGift Card

Our ratings

Effectiveness in Reducing Kidney Disease Symptoms

4.1/5
Great

Palatability and Ease of Consumption

4.0/5
Great

Ingredient Quality and Potency

4.0/5
Great

Digestive Tolerance and Side Effects

3.8/5
Good

Is this kidney supplement right for my pet?

Top Ingredients

Maltodextrins (produced from potatoes and maize), Hydroxypropyl Methylcellulose (< 8%)

Special Diet

Odor-Free

Packaging Type

Pouch