Cat Years Hydration Booster is a lickable treat, not a complete diet or a treatment for dehydration or urinary disease. In a one-week review, Cats.com reviewer Annie Butler reported that three household cats and two foster kittens accepted both flavors. A separate, small controlled study found hydration-marker changes in healthy cats given treats with a similar ingredient profile, but it does not prove that this product prevents or treats disease.
What is Cat Years Hydration Booster?
It is a daily lickable cat treat available in chicken and tuna. Cat Years describes it as a treat rather than complete-and-balanced primary nutrition. The manufacturer lists an 18 g (0.64 oz) serving and suggests at least one treat per day, up to two for healthy adult cats; follow veterinary advice for your cat’s individual needs. Cat Years’ product page lists 11 kcal per 18 g treat, or 598 kcal ME/kg, calculated.
Flavors and ingredients
Both ingredient lists start with tuna broth and include glycine, natural tapioca starch, purified mineral salt, dried yeast, chicken liver, guar gum, taurine, L-alanine and betaine. The tuna version adds wild-caught tuna; the chicken version adds chicken breast. The manufacturer describes amino acids, electrolytes and osmolytes as its hydration blend. Compare the full ingredient list with your cat’s known sensitivities, particularly because both formulas list chicken liver even though one flavor is labeled tuna.
Guaranteed analysis
| Measure | Manufacturer listing |
|---|---|
| Crude protein | 14% minimum |
| Crude fat | 0.4% minimum |
| Crude fiber | 0.1% maximum |
| Moisture | 85% maximum |
| Calories | 11 kcal per 18 g treat; 598 kcal ME/kg, calculated |
These are the manufacturer’s published figures, accessed in 2026. Moisture is listed as a maximum, not a guarantee that every serving contains exactly 85% water.
#1 Best Overall
- Dog multivitamins chewable for skin & coat : Dog multivitamin is rich in Omega-3 fatty acids and vitamin E,which can relieve skin allergies,dryness,itching and other problems.Multivitamin for dogs nourishes skin follicles.Long-term consumption of dog vitamins multivitamin can make dog hair stronger and smoother,and reduce coat loss.The COQ10 in dog multivitamin chewable can resist oxidation and delay cell aging.Dogs with skin injuries can eat dog vitamins and supplements to promote wound healing
- Dog multivitamin relieves joint inflammation: Dog vitamins for hip and joint can supplement high-quality MSM, glucosamine, and chondroitin sulfate to promote cartilage development and repair. Long-term consumption of dog multivitamins chewable can enhance the elasticity and toughness of joint cartilage, improve joint flexibility, and move more freely. Dog multivitamin chews can reduce joint friction and relieve joint pain. Dog vitamins and supplements can prevent and improve dog joint problems
- Dog multivitamin chews are good for the gut: Vet-endorsed formula dog vitamins and supplements made from natural ingredients.Dog vitamins multivitamin chewables contain a rich blend of probiotics to support intestinal and digestive health.Dog vitamins for small dogs can regulate the balance of intestinal flora,help calcium absorption,and promote bone development.Dog multivitamins chewables improve energy metabolism,converting food into energy, making dogs more energetic in their daily activities
- Dog multivitamin chews protect overall health:Senior dog vitamins and supplements help improve blood circulation and prevent cardiovascular disease.Dog multivitamins chewable support normal liver function,promote liver detoxification,and improve negative mood.For dog with heart problems and older dog,taking dog vitamins and supplements in moderation is an auxiliary health care measure.Dog vitamins multivitamin helps enhance white blood cell activity,improve immunity,prevent infection and disease
- Dog multivitamins chewable promote brain development: The DHA in krill oil in multivitamin for dogs is an important component of the brain and retina. Dog vitamins and supplements can improve dog cognitive ability. When training puppies to learn basic commands, puppies who are properly supplemented with dog vitamins multivitamin will behave more intelligently and improve memory.Dog supplements & vitamins can prevent and relieve eye problems such as dry eyes and tear stains, and keep eyes healthy
What did the five-cat review find?
In its review published October 2, 2026, Cats.com says Butler tried both flavors over one week with three household cats and two foster kittens. She reported that all five ate both flavors. She also tried serving the treat in a bowl, on a spoon and as a dry-food topper. These are the reviewer’s observations, not a guarantee that another cat will accept it.
Cats.com gave the product 49/60 (A−) across six categories. That is the review’s rating, not a scientific measure of effectiveness. The review also reported 4.8 stars from 105 Amazon reviews and 4.9 stars from more than 800 reviews on the official site at publication; ratings and counts may change.
Rank #2
- 8-in-1 Formula - Zesty Paws Multifunctional Bites are functional supplement chews with premium ingredients that support physical performance, antioxidants, hip & joint, heart, immune, skin, liver, & gut health for dogs of all ages, breeds, and sizes.
- Skin Health & Antioxidants – For animals with sensitive skin, this formula contains Cod Liver Fish Oil and Vitamin E to help maintain normal moisture and CoQ10 to help reduce oxidative stress.
- Hip, Joint & Performance Support - Each dog chew features OptiMSM, a premium form of MSM for muscular support, which works synergistically with the Glucosamine HCl and Chondroitin Sulfate in these chews for hip and joint support plus Cod Liver Oil and B-Complex Vitamins support normal physical performance.
- Gut Health & Probiotics - These chews also contain a six-strain Gut Health Blend (500 million cfu per chew) and a Digestive Health Blend to promote gut flora while supporting normal bowel function for dogs.
- Heart, Liver & Immune Health - Multifunctional Bites feature powerful antioxidants, premium CoQ10, Cod Liver Oil and Vitamins A, C, & E to promote healthy cardiovascular function, support liver health and enhance immune response.
Does the evidence show that it improves hydration?
A 2026 peer-reviewed study by Kosmal and colleagues in the Journal of Feline Medicine and Surgery tested high-moisture lickable treats containing glycine, alanine, taurine, betaine and sodium in healthy cats fed dry diets. The sample was 12 neutered male domestic shorthair colony cats aged 5–6 years. The authors reported increased total water intake and lower urine specific gravity, as well as changes in other hydration measures. Their conclusion was: “Overall, both treats increased TWI and additional hydration benefits were reflected in decreased USG, UP and CR. No adverse effects were observed with either treatment.” The study supports a finding in its tested cats and controlled conditions; it does not establish that Cat Years Hydration Booster prevents or treats dehydration, kidney disease or urinary disease in every cat.
The manufacturer cites this study when saying one treat per day increased total water intake and lowered urine specific gravity. Those are study findings about the tested treats and study population, not proof of improved health outcomes for an individual cat. The study article discloses that coauthor Lawrence E. Armstrong served as a paid consultant and advisory-board member for Peturio Holdings, doing business as Cat Years.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Rank #3
- COMPLETE 26-IN-1 DAILY WELLNESS FORMULA: Our advanced multivitamin for dogs is formulated to help support 26 vital nutritional areas as part of a daily routine. With essential vitamins A, C, D3, and E, these gummies help support the immune system and contribute to overall heart and brain health for dogs of all sizes.
- ADVANCED HIP AND JOINT MOBILITY SUPPORT: Formulated with Glucosamine HCl, Chondroitin, and MSM to help support cartilage health, joint flexibility, and everyday mobility — making them a great daily supplement for large breed dogs and active senior dogs.
- SKIN & COAT SUPPORT: Packed with Norwegian Salmon Oil and Biotin, our dog multivitamin helps nourish skin from within and supports a soft, glossy coat. Omega 3 fatty acids contribute to healthy skin and coat as part of a complete daily nutritional routine.
- PROBIOTICS & DIGESTIVE SUPPORT: Features a Six-Probiotic Blend (500 Million CFU) and Digestive Enzymes to help support gut health, smooth digestion, and nutrient absorption. Cranberry Powder is included as part of this comprehensive daily wellness formula.
- UNBEATABLE VALUE 250 COUNT JAR: Our 250-count jar provides lasting daily support in a delicious chicken flavor. Made in the USA in a GMP-certified facility, our soft chews are grain-free and suitable for puppies, adult, and senior dogs alike.
Is it worth trying for a picky cat?
The five-cat review offers a modest reason to consider it if your cat likes lickable treats: the reviewer reported acceptance across both flavors and several serving methods. But one small reviewer test cannot predict an individual cat’s preference. If you try it, start with the flavor whose protein source best fits your cat’s diet and sensitivities, and offer a small amount in a familiar way.
For a comparison with another treat, check the protein sources and other ingredients, moisture and calories per serving, price per treat, feeding directions, and how closely any hydration evidence applies to your cat. The cited sources do not establish a controlled head-to-head comparison with named competing treats. If your cat has a medical condition, food allergy, prescription diet or signs of dehydration, ask your veterinarian before changing its treats or relying on one for hydration.
Rank #4
- Joint Health Supplement for Dogs: Cosequin is the #1 vet recommended retail joint health supplement brand, supporting joint health in dogs for over 25 years
- Contains Glucosamine for Dogs: Cosequin contains glucosamine hydrochloride (FCHG49) and sodium chondroitin sulfate (TRH122), plus methylsulfonylmethane (MSM). This unique combination of ingredients supports healthy joints
- For Any Breed or Size: Whether you have a young or senior dog, a small or large breed, Cosequin helps support their joint health
- Tasty Chews for Daily Use: Cosequin comes in a tasty chewable tablet, making daily administration easy and convenient
- Exceptional Quality: Cosequin is backed by science, undergoing thorough quality inspections to ensure your dog receives a safe, high-quality product. It is manufactured in the United States with globally sourced ingredients
Buying and safety checks
Cats.com reported Amazon availability and a $9.99 price for each flavor when its review was published on October 2, 2026. At access, the manufacturer’s page displayed a 28-treat offer with subscription and one-time purchase terms. These listings and prices can change, so check the manufacturer’s current product page and any retailer listing for availability, serving directions and current cost before purchasing.
The Cats.com review said it found no listing in the FDA Food Recall Database since the product’s market launch. That historical report is not a current, independently verified recall check, so it should not be treated as confirmation of present regulatory or recall status.
Recommended Free Tools
Quick Recap
Best Value
- Itch & Allergy Relief with Omega-3 for Dogs - with 500mg of Omega (EPA+DHA) per serving, our chewable supplement helps with hot spots, dry itchy skin, ease itching, irritated skin, stops shedding.
- Skin & Coat + Hip & Joint Supplement Combined - Omega 3 is a vital element to keep your pet active, support healthy hip and joints, brain, heart, immune health. Can be served with regular pet food.
- Bark&Spark Commitment - we are keen to give best to our furry customers and we take NO compromise when it comes to product quality. Our omega 3 bites are made in the USA, with human grade ingredients.
- Up to 3 Month Supply - with 180 salmon oil treats per jar you keep your pet healthy while not spending a fortune on overpriced supplements. Best value.
- Is Your Dog a Picky Eater? We stick to simple formulas rich in natural flavors, that could tempt a fussy eater. No hassle with pills, powder, tablets or capsules.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
