• Cat
  • Vitamins & Supplements
  • Immune System & Allergy
  • Powders

Immune System & Allergy Powder Supplements for Cats

(1 - 36 of 44 results)

Purina Pro Plan Veterinary Diets FortiFlora Probiotic Gastrointestinal Support Cat Supplement, 30 packets More Choices Available

Purina Pro Plan Veterinary Diets FortiFlora Probiotic Gastrointestinal Support Cat Supplement, …

Save an Extra 15% on Autoship

$29.44 Autoship & Save

$30.99

1250

FREE 1-3 day shipping over $49

USD
Purina Pro Plan Veterinary Diets FortiFlora Probiotic Gastrointestinal Support Cat Supplement, 30 packets
64893
Purina Pro Plan Veterinary Diets
1493
30.99
1
30 packets
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Tomlyn Immune Support L-Lysine Powder Cat Supplement, 3.5-oz tub

Tomlyn Immune Support L-Lysine Powder Cat Supplement, 3.5-oz tub

$13.01 Autoship & Save

$13.69 $19.99

387

FREE 1-3 day shipping over $49

USD
Tomlyn Immune Support L-Lysine Powder Cat Supplement, 3.5-oz tub
72293
Tomlyn
420
13.69
2
false
{ "deal": false, "strike": false, "greenbar": false }
The Honest Kitchen Daily Boosters Instant Goat's Milk with Probiotics for Dogs & Cats, 5.2-oz jar More Choices Available

The Honest Kitchen Daily Boosters Instant Goat's Milk with Probiotics for Dogs & Cats, 5.2-oz j…

$14.22 Autoship & Save

$14.97 $14.99

275

FREE 1-3 day shipping over $49

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The Honest Kitchen Daily Boosters Instant Goat's Milk with Probiotics for Dogs & Cats, 5.2-oz jar
150272
The Honest Kitchen
1485
14.97
3
5.2-oz jar
false
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Nutramax Imuquin Immune Health Support Cat Supplement, 30 count

Nutramax Imuquin Immune Health Support Cat Supplement, 30 count

$28.49 Autoship & Save

$29.99

30

FREE 1-3 day shipping over $49

USD
Nutramax Imuquin Immune Health Support Cat Supplement, 30 count
214513
Nutramax
1574
29.99
4
30 count
false
{ "deal": false, "strike": false, "greenbar": false }
Solid Gold Supplements SeaMeal Skin & Coat, Digestive & Immune Health Powder Grain-Free Dog & Cat Supplement, 1-lb More Choices Available

Solid Gold Supplements SeaMeal Skin & Coat, Digestive & Immune Health Powder Grain-Free Dog & C…

$10.41 Autoship & Save

$10.96 $24.99

201

FREE 1-3 day shipping over $49

USD
Solid Gold Supplements SeaMeal Skin & Coat, Digestive & Immune Health Powder Grain-Free Dog & Cat Supplement, 1-lb
64250
Solid Gold Supplements
1485
10.96
5
1-lb jar
false
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Fera Pet Organics Probiotics with Organic Prebiotics for Dogs & Cats, 72-g

Fera Pet Organics Probiotics with Organic Prebiotics for Dogs & Cats, 72-g

$18.95 Autoship & Save

$19.95

68

FREE 1-3 day shipping over $49

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Fera Pet Organics Probiotics with Organic Prebiotics for Dogs & Cats, 72-g
165102
Fera Pet Organics
1485
19.95
6
72-g
false
{ "deal": false, "strike": false, "greenbar": false }
NOW Pets L-Lysine Immune System Support Cat Supplement, 8-oz jar

NOW Pets L-Lysine Immune System Support Cat Supplement, 8-oz jar

$11.67 $15.99

67

FREE 1-3 day shipping over $49

USD
NOW Pets L-Lysine Immune System Support Cat Supplement, 8-oz jar
140252
NOW Pets
420
11.67
7
8-oz jar
false
{ "deal": false, "strike": false, "greenbar": false }
Nusentia Probiotic Miracle Premium Blend Dog & Cat Supplement, 131g jar More Choices Available

Nusentia Probiotic Miracle Premium Blend Dog & Cat Supplement, 131g jar

$39.99

93

FREE 1-3 day shipping over $49

USD
Nusentia Probiotic Miracle Premium Blend Dog & Cat Supplement, 131g jar
104668
Nusentia
1485
39.99
8
131g jar
false
{ "deal": false, "strike": false, "greenbar": false }
Dr. Mercola Organic Mushroom Complex Dog & Cat Supplement, 2.1-oz jar

Dr. Mercola Organic Mushroom Complex Dog & Cat Supplement, 2.1-oz jar

$18.97 Autoship & Save

$19.97 $24.99

33

FREE 1-3 day shipping over $49

USD
Dr. Mercola Organic Mushroom Complex Dog & Cat Supplement, 2.1-oz jar
135870
Dr. Mercola
1562
19.97
9
2.1-oz jar
false
{ "deal": false, "strike": false, "greenbar": false }
Vetoquinol Viralys L-Lysine Powder Cat Supplement, 21.2-oz More Choices Available

Vetoquinol Viralys L-Lysine Powder Cat Supplement, 21.2-oz

$91.14 Autoship & Save

$95.94 $98.81

441

FREE 1-3 day shipping on this item

USD
Vetoquinol Viralys L-Lysine Powder Cat Supplement, 21.2-oz
81940
Vetoquinol
420
95.94
10
21.2-oz
false
{ "deal": false, "strike": false, "greenbar": false }
Strawfield Pets Pre + Probiotic Powder Cat Supplement, 4.2-oz jar

Strawfield Pets Pre + Probiotic Powder Cat Supplement, 4.2-oz jar

$23.72 Autoship & Save

$24.97 $26.99

13

FREE 1-3 day shipping over $49

USD
Strawfield Pets Pre + Probiotic Powder Cat Supplement, 4.2-oz jar
169441
Strawfield Pets
1493
24.97
11
4.2-oz
false
{ "deal": false, "strike": false, "greenbar": false }
NaturVet Kelp Help Mineral & Vitamin Dog & Cat Powder Supplement, 1-lb More Choices Available

NaturVet Kelp Help Mineral & Vitamin Dog & Cat Powder Supplement, 1-lb

$16.14 Autoship & Save

$16.99 $19.72

41

FREE 1-3 day shipping over $49

USD
NaturVet Kelp Help Mineral & Vitamin Dog & Cat Powder Supplement, 1-lb
60358
NaturVet
1562
16.99
12
1-lb
false
{ "deal": false, "strike": false, "greenbar": false }
NaturVet Brewer's Dried Yeast Formula with Garlic Dog & Cat Powder Supplement, 1-lb More Choices Available

NaturVet Brewer's Dried Yeast Formula with Garlic Dog & Cat Powder Supplement, 1-lb

$13.29 Autoship & Save

$13.99 $14.15

69

FREE 1-3 day shipping over $49

USD
NaturVet Brewer's Dried Yeast Formula with Garlic Dog & Cat Powder Supplement, 1-lb
60327
NaturVet
1562
13.99
13
1-lb tub
false
{ "deal": false, "strike": false, "greenbar": false }
NaturVet Aller-911 Skin & Coat Plus Allergy Aid Dog & Cat Powder Supplement, 9-oz bag

NaturVet Aller-911 Skin & Coat Plus Allergy Aid Dog & Cat Powder Supplement, 9-oz bag

$18.99 Autoship & Save

$19.99 $26.81

59

FREE 1-3 day shipping over $49

USD
NaturVet Aller-911 Skin & Coat Plus Allergy Aid Dog & Cat Powder Supplement, 9-oz bag
60286
NaturVet
1562
19.99
14
false
{ "deal": false, "strike": false, "greenbar": false }
Nusentia Enzyme Miracle Digestive & Metabolic Dog & Cat Supplement, 273g jar More Choices Available

Nusentia Enzyme Miracle Digestive & Metabolic Dog & Cat Supplement, 273g jar

$38.58

36

FREE 1-3 day shipping over $49

USD
Nusentia Enzyme Miracle Digestive & Metabolic Dog & Cat Supplement, 273g jar
104672
Nusentia
1485
38.58
15
273g jar
false
{ "deal": false, "strike": false, "greenbar": false }
Nature's Pure Edge D-Mannose Chicken Flavored Dog & Cat Supplement, 4-oz jar

Nature's Pure Edge D-Mannose Chicken Flavored Dog & Cat Supplement, 4-oz jar

$21.35 Autoship & Save

$22.47

5

FREE 1-3 day shipping over $49

USD
Nature's Pure Edge D-Mannose Chicken Flavored Dog & Cat Supplement, 4-oz jar
214968
Nature's Pure Edge
1485
22.47
16
false
{ "deal": false, "strike": false, "greenbar": false }
Rx Vitamins Bio-C Dog & Cat Supplement, 4-oz bottle

Rx Vitamins Bio-C Dog & Cat Supplement, 4-oz bottle

$17.10 Autoship & Save

$18.00

3

FREE 1-3 day shipping over $49

USD
Rx Vitamins Bio-C Dog & Cat Supplement, 4-oz bottle
166039
Rx Vitamins
1562
18.00
17
114-g
false
{ "deal": false, "strike": false, "greenbar": false }
Thomas Labs Felo Lysine Powder Cat Supplement,, 2.2-lb jar

Thomas Labs Felo Lysine Powder Cat Supplement,, 2.2-lb jar

$37.61 Autoship & Save

$39.59 $39.99

4

FREE 1-3 day shipping over $49

USD
Thomas Labs Felo Lysine Powder Cat Supplement,, 2.2-lb jar
162347
Thomas Labs
420
39.59
18
2.2-lb
false
{ "deal": false, "strike": false, "greenbar": false }
Vita Pet Life Coco and Luna L-Lysine Immune Support Salmon Flavor Powder Dog & Cat Supplement, 4-oz jar

Vita Pet Life Coco and Luna L-Lysine Immune Support Salmon Flavor Powder Dog & Cat Supplement, …

$18.90 Autoship & Save

$19.90

2

FREE 1-3 day shipping over $49

USD
Vita Pet Life Coco and Luna L-Lysine Immune Support Salmon Flavor Powder Dog & Cat Supplement, 4-oz jar
253121
Vita Pet Life
377
19.90
19
false
{ "deal": false, "strike": false, "greenbar": false }
BIXBI Organic Pet Superfood Immunity Daily Dog & Cat Supplement, 2.12-oz jar

BIXBI Organic Pet Superfood Immunity Daily Dog & Cat Supplement, 2.12-oz jar

$26.59 Autoship & Save

$27.99

54

FREE 1-3 day shipping over $49

USD
BIXBI Organic Pet Superfood Immunity Daily Dog & Cat Supplement, 2.12-oz jar
58153
BIXBI
1562
27.99
20
2.12-oz jar
false
{ "deal": false, "strike": false, "greenbar": false }
kin+kind Raw Vitaboost Multivitamin Dog & Cat Supplement, 8-oz bottle More Choices Available

kin+kind Raw Vitaboost Multivitamin Dog & Cat Supplement, 8-oz bottle

$18.94 Autoship & Save

$19.94 $19.99

3

FREE 1-3 day shipping over $49

USD
kin+kind Raw Vitaboost Multivitamin Dog & Cat Supplement, 8-oz bottle
203615
kin+kind
1562
19.94
21
8-oz bottle
false
{ "deal": false, "strike": false, "greenbar": false }
The Missing Link Professional Veterinary Formula Recovery & Detoxification Superfood Dog & Cat Supplement, 1-lb

The Missing Link Professional Veterinary Formula Recovery & Detoxification Superfood Dog & Cat …

Save 20% at Checkout

$23.74 Autoship & Save

$24.99

2

FREE 1-3 day shipping over $49

USD
The Missing Link Professional Veterinary Formula Recovery & Detoxification Superfood Dog & Cat Supplement, 1-lb
173780
The Missing Link
1485
24.99
22
1-lb
false
{ "deal": false, "strike": false, "greenbar": false }
Nature's Farmacy Catzymes Probiotic Digestive Enhancer Cat Supplement, 8-oz jar

Nature's Farmacy Catzymes Probiotic Digestive Enhancer Cat Supplement, 8-oz jar

$17.95 $19.90

13

FREE 1-3 day shipping over $49

USD
Nature's Farmacy Catzymes Probiotic Digestive Enhancer Cat Supplement, 8-oz jar
173828
Nature's Farmacy
1493
17.95
23
8-oz jar
false
{ "deal": false, "strike": false, "greenbar": false }
Dr. Mercola Curcumin Dog & Cat Supplement, 4.30-oz jar

Dr. Mercola Curcumin Dog & Cat Supplement, 4.30-oz jar

$28.47 Autoship & Save

$29.97 $37.49

9

FREE 1-3 day shipping over $49

USD
Dr. Mercola Curcumin Dog & Cat Supplement, 4.30-oz jar
135888
Dr. Mercola
1562
29.97
24
4.30-oz jar
false
{ "deal": false, "strike": false, "greenbar": false }
VetSmart Formulas Critical Immune Defense Dog & Cat Supplement, 6.3-oz bottle

VetSmart Formulas Critical Immune Defense Dog & Cat Supplement, 6.3-oz bottle

$56.95 Autoship & Save

$59.95 $64.95

2

FREE 1-3 day shipping on this item

USD
VetSmart Formulas Critical Immune Defense Dog & Cat Supplement, 6.3-oz bottle
221393
VetSmart Formulas
1562
59.95
25
false
{ "deal": false, "strike": false, "greenbar": false }
Rx Vitamins Nutritional Support Dog & Cat Supplement, 9.07-oz jar

Rx Vitamins Nutritional Support Dog & Cat Supplement, 9.07-oz jar

$32.30 Autoship & Save

$34.00

1

FREE 1-3 day shipping over $49

USD
Rx Vitamins Nutritional Support Dog & Cat Supplement, 9.07-oz jar
166084
Rx Vitamins
1485
34.00
26
9.07-oz
false
{ "deal": false, "strike": false, "greenbar": false }
The Missing Link Pet Kelp Feline Well-Being Cat Supplement, 6-oz bag

The Missing Link Pet Kelp Feline Well-Being Cat Supplement, 6-oz bag

Save 20% at Checkout

$14.24 Autoship & Save

$14.99 $16.99

10

FREE 1-3 day shipping over $49

USD
The Missing Link Pet Kelp Feline Well-Being Cat Supplement, 6-oz bag
113075
The Missing Link
1574
14.99
27
6-oz bag
false
{ "deal": false, "strike": false, "greenbar": false }
BIXBI Organic Pet Superfood Digestion Daily Dog & Cat Supplement, 2.12-oz jar

BIXBI Organic Pet Superfood Digestion Daily Dog & Cat Supplement, 2.12-oz jar

$26.55 Autoship & Save

$27.95

9

FREE 1-3 day shipping over $49

USD
BIXBI Organic Pet Superfood Digestion Daily Dog & Cat Supplement, 2.12-oz jar
58152
BIXBI
1485
27.95
28
false
{ "deal": false, "strike": false, "greenbar": false }
Vital Planet Flora Cat Daily Probiotic Powder Cat Supplement, 3.9-oz jar

Vital Planet Flora Cat Daily Probiotic Powder Cat Supplement, 3.9-oz jar

$29.99

1

FREE 1-3 day shipping over $49

USD
Vital Planet Flora Cat Daily Probiotic Powder Cat Supplement, 3.9-oz jar
232135
Vital Planet
1493
29.99
29
false
{ "deal": false, "strike": false, "greenbar": false }
Dr. Mercola Immune Balance Dog & Cat Supplement, 3.38-oz jar

Dr. Mercola Immune Balance Dog & Cat Supplement, 3.38-oz jar

$33.22 Autoship & Save

$34.97 $43.75

2

FREE 1-3 day shipping over $49

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Dr. Mercola Immune Balance Dog & Cat Supplement, 3.38-oz jar
179805
Dr. Mercola
1562
34.97
30
96-g
false
{ "deal": false, "strike": false, "greenbar": false }
BIXBI Organic Pet Superfood Skin & Coat Daily Dog & Cat Supplement, 2.12-oz jar

BIXBI Organic Pet Superfood Skin & Coat Daily Dog & Cat Supplement, 2.12-oz jar

$26.12 Autoship & Save

$27.50

16

FREE 1-3 day shipping over $49

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BIXBI Organic Pet Superfood Skin & Coat Daily Dog & Cat Supplement, 2.12-oz jar
58154
BIXBI
1562
27.50
31
2.12-oz jar
false
{ "deal": false, "strike": false, "greenbar": false }
Thomas Labs Felo Lysine Powder Cat Supplement, 12-oz jar

Thomas Labs Felo Lysine Powder Cat Supplement, 12-oz jar

$20.89 Autoship & Save

$21.99

FREE 1-3 day shipping over $49

USD
Thomas Labs Felo Lysine Powder Cat Supplement, 12-oz jar
255257
Thomas Labs
1574
21.99
32
false
{ "deal": false, "strike": false, "greenbar": false }
Equa Holistics Total Digest Probiotics & Enzymes Cat Supplement, 1.59-oz tub More Choices Available

Equa Holistics Total Digest Probiotics & Enzymes Cat Supplement, 1.59-oz tub

$33.20 Autoship & Save

$34.95 $50.31

4

FREE 1-3 day shipping over $49

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Equa Holistics Total Digest Probiotics & Enzymes Cat Supplement, 1.59-oz tub
199780
Equa Holistics
1493
34.95
33
1.59-oz tub
false
{ "deal": false, "strike": false, "greenbar": false }
Vita Pet Life Coco and Luna Multivitamin 6-In-1 Salmon Flavor Powder Dog & Cat Supplement, 4-oz jar

Vita Pet Life Coco and Luna Multivitamin 6-In-1 Salmon Flavor Powder Dog & Cat Supplement, 4-oz…

$18.90 Autoship & Save

$19.90

FREE 1-3 day shipping over $49

USD
Vita Pet Life Coco and Luna Multivitamin 6-In-1 Salmon Flavor Powder Dog & Cat Supplement, 4-oz jar
253113
Vita Pet Life
1562
19.90
34
false
{ "deal": false, "strike": false, "greenbar": false }
Animal Health Solutions Spunky Probiotics, Enzymes Yucca & Glucosamine Dog & Cat Supplement, 1-lb bag More Choices Available

Animal Health Solutions Spunky Probiotics, Enzymes Yucca & Glucosamine Dog & Cat Supplement, 1-…

$31.05 Autoship & Save

$32.68 $34.78

FREE 1-3 day shipping over $49

USD
Animal Health Solutions Spunky Probiotics, Enzymes Yucca & Glucosamine Dog & Cat Supplement, 1-lb bag
207341
Animal Health Solutions
1485
32.68
35
1-lb bag
false
{ "deal": false, "strike": false, "greenbar": false }
Vita Pet Life Coco and Luna Probiotics & Enzymes Flora & Digestive Support Salmon Flavor Powder Dog & Cat Supplement, 4-oz jar

Vita Pet Life Coco and Luna Probiotics & Enzymes Flora & Digestive Support Salmon Flavor Powder…

$18.90 Autoship & Save

$19.90

4

FREE 1-3 day shipping over $49

USD
Vita Pet Life Coco and Luna Probiotics & Enzymes Flora & Digestive Support Salmon Flavor Powder Dog & Cat Supplement, 4-oz jar
253117
Vita Pet Life
1485
19.90
36
false
{ "deal": false, "strike": false, "greenbar": false }
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