10 Best Water Additives for Cats 2025: According to Reviews | Chewy

The 10 Best Water Additives for Cats

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How we created this water additive list

We leveraged input from our veterinarians and artificial intelligence to identify key considerations to help you find the best water additives 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 water additives for cats.

Key water additive considerations

Ease of Use

Effectiveness

Ingredients

Taste

1
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle
Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle

Oxyfresh Premium Pet Care Solution Cat & Dog Dental Water Additive, 16-fl oz bottle

Rated 4.4 out of 5 stars
1,678
$17.95Chewy Price
($1.13/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.3/5
Great

Effectiveness

4.3/5
Great

Ingredients

4.4/5
Great

Taste

4.2/5
Great

Is this water additive right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Water (Aqua), Sodium Benzoate, Sodium Citrate, Stabilized Chlorine Dioxide (Oxygene®), Zinc Acetate

Food Flavor

Unflavored
2
Dental Fresh Advanced Plaque & Tartar Dog & Cat Dental Water Additive, 17-fl oz bottle
Dental Fresh Advanced Plaque & Tartar Dog & Cat Dental Water Additive, 17-fl oz bottle
Dental Fresh Advanced Plaque & Tartar Dog & Cat Dental Water Additive, 17-fl oz bottle
Dental Fresh Advanced Plaque & Tartar Dog & Cat Dental Water Additive, 17-fl oz bottle
Dental Fresh Advanced Plaque & Tartar Dog & Cat Dental Water Additive, 17-fl oz bottle
Dental Fresh Advanced Plaque & Tartar Dog & Cat Dental Water Additive, 17-fl oz bottle

Dental Fresh Advanced Plaque & Tartar Dog & Cat Dental Water Additive, 17-fl oz bottle

Rated 4.3 out of 5 stars
1,893
$8.95Chewy Price
($0.53/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.3/5
Great

Effectiveness

4.3/5
Great

Ingredients

4.3/5
Great

Taste

4.1/5
Great

Is this water additive right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Purified Water, Stabilized Chlorine Dioxide, Sodium Bicarbonate, Potassium Sorbate, Sodium Benzoate

Food Flavor

Unflavored
3
Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle
Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle
Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle
Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle
Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle
Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle
Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle

Oratene Enzymatic Brushless Oral Care Dog & Cat Dental Water Additive, 8-fl oz bottle

Rated 4.3 out of 5 stars
773
$25.79Chewy Price
($3.23/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.3/5
Great

Effectiveness

4.3/5
Great

Ingredients

4.3/5
Great

Taste

4.2/5
Great

Is this water additive right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Glucose Oxidase, Glycerine, Potassium Sorbate, Potassium Thiocyanate, Purified Water

Food Flavor

Unflavored
4
VETRADENT Dog & Cat Dental Water Additive, 17-fl oz bottle
VETRADENT Dog & Cat Dental Water Additive, 17-fl oz bottle
VETRADENT Dog & Cat Dental Water Additive, 17-fl oz bottle

VETRADENT Dog & Cat Dental Water Additive, 17-fl oz bottle

Rated 4.3 out of 5 stars
311
$14.37Chewy Price
($0.85/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

3.9/5
Good

Effectiveness

4.0/5
Great

Ingredients

4.1/5
Great

Taste

3.7/5
Good

Is this water additive right for my pet?

Lifestage

All Lifestages, Adult

Health Feature

Dental & Breath Care
5
Virbac C.E.T. Aquadent Fr3sh Dog & Cat Dental Solution, 16.9-fl oz bottle
Virbac C.E.T. Aquadent Fr3sh Dog & Cat Dental Solution, 16.9-fl oz bottle
Virbac C.E.T. Aquadent Fr3sh Dog & Cat Dental Solution, 16.9-fl oz bottle

Virbac C.E.T. Aquadent Fr3sh Dog & Cat Dental Solution, 16.9-fl oz bottle

Rated 4.2 out of 5 stars
353
$16.77Chewy Price
($1.00/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.1/5
Great

Effectiveness

4.2/5
Great

Ingredients

4.2/5
Great

Taste

3.8/5
Good

Is this water additive right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Erythritol, Inulin, Pomegranate Extract

Food Flavor

Unflavored
6
TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle
TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle
TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle
TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle
TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle
TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle
TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle

TropiClean Fresh Breath Oral Care Cat Water Additive, 16-fl oz bottle

Rated 4.2 out of 5 stars
270
$14.99Chewy Price
($0.94/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.3/5
Great

Effectiveness

4.2/5
Great

Ingredients

4.2/5
Great

Taste

4.1/5
Great

Is this water additive right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Cetylpyridinium Chloride, Green Tea Extract, Zinc Gluconate, Citric Acid, Glycerin

Food Flavor

Unflavored

Health Feature

Dental & Breath Care
7
Dental Fresh Original Formula Cat Dental Water Additive, 8-fl oz bottle
Dental Fresh Original Formula Cat Dental Water Additive, 8-fl oz bottle
Dental Fresh Original Formula Cat Dental Water Additive, 8-fl oz bottle
Dental Fresh Original Formula Cat Dental Water Additive, 8-fl oz bottle
Dental Fresh Original Formula Cat Dental Water Additive, 8-fl oz bottle
Dental Fresh Original Formula Cat Dental Water Additive, 8-fl oz bottle

Dental Fresh Original Formula Cat Dental Water Additive, 8-fl oz bottle

Rated 4.1 out of 5 stars
309
$7.99Chewy Price
($1.00/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.3/5
Great

Effectiveness

4.4/5
Great

Ingredients

4.1/5
Great

Taste

4.3/5
Great

Is this water additive right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Purified Water, Stabilized Chlorine Dioxide, Sodium Bicarbonate, Potassium Sorbate, Sodium Benzoate

Food Flavor

Original

Health Feature

Dental & Breath Care
8
Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle
Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle
Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle
Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle
Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle
Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle
Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle

Creative Science BreathaLyser Dog & Cat Dental Water Additive, 500-ml bottle

Rated 4.3 out of 5 stars
103
$15.99Chewy Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.2/5
Great

Effectiveness

3.9/5
Good

Ingredients

4.4/5
Great

Taste

4.0/5
Great

Is this water additive right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Purified Water, Glycerine, Polysorbate 20, Stabilized Chlorine Dioxide, Potassium Sorbate

Food Flavor

Unflavored
9
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle
Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle

Skout's Honor Oral Care Fresh & Flavorless Dog & Cat Dental Water Additive, 32-fl oz bottle

Rated 4.2 out of 5 stars
78
$24.99Chewy Price
($0.79/fl oz)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.5/5
Great

Effectiveness

4.0/5
Great

Ingredients

4.0/5
Great

Taste

4.0/5
Great

Is this water additive right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Water, Sodium Citrate, Citric Acid, Disodium EDTA, Potassium Benzoate

Food Flavor

Unflavored
10
Dental Fresh Original Formula Dog & Cat Dental Water Additive, 1 gal bottle
Dental Fresh Original Formula Dog & Cat Dental Water Additive, 1 gal bottle
Dental Fresh Original Formula Dog & Cat Dental Water Additive, 1 gal bottle
Dental Fresh Original Formula Dog & Cat Dental Water Additive, 1 gal bottle
Dental Fresh Original Formula Dog & Cat Dental Water Additive, 1 gal bottle
Dental Fresh Original Formula Dog & Cat Dental Water Additive, 1 gal bottle

Dental Fresh Original Formula Dog & Cat Dental Water Additive, 1 gal bottle

Rated 4.3 out of 5 stars
426
$48.99Chewy Price
($48.99/gl)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Ease of Use

4.1/5
Great

Effectiveness

4.2/5
Great

Ingredients

4.2/5
Great

Taste

4.2/5
Great

Is this water additive right for my pet?

Breed Size

All Breeds

Lifestage

All Lifestages, Adult

Top Ingredients

Purified Water, Stabilized Chlorine Dioxide, Sodium Bicarbonate, Potassium Sorbate, Sodium Benzoate

Food Flavor

Original