Pet Supplements for Pets: What Works and What Doesn’t

March 3, 2026

We get asked about pet supplements all the time — and honestly, we love that pet parents are thinking proactively about their companions’ health. With so many options lining store shelves and popping up online, it can feel overwhelming. So which supplements truly support your pet’s health, and which ones rely more on marketing than science? Let’s break it down in a clear, friendly way so you can feel confident about your choices.

What Are Pet Supplements?

Pet supplements are products designed to support your pet’s health beyond their regular diet. They may include vitamins, minerals, fatty acids, probiotics, or herbal ingredients, and they often target specific concerns like joints, digestion, skin health, or immunity.

You’ll find them in many forms — soft chews, capsules, powders, and liquids. While some supplements can play a helpful role in certain situations, not every pet needs them. A balanced commercial diet already meets the nutritional needs of most healthy dogs and cats.

For example, fish oil supplements rich in omega-3 fatty acids are among the most studied options. Research published through the National Institutes of Health found that omega-3 supplementation improved pain scores and quality of life in dogs with joint concerns, especially small and medium breeds. That’s meaningful support when used appropriately and under veterinary guidance.

Which Pet Supplements Actually Work?

Not all supplements are created equal. Some show strong evidence for specific uses, while others produce mixed results.

Are Joint Supplements Worth It?

Joint supplements remain one of the most popular categories — especially for aging dogs.

Omega-3 fatty acids (EPA and DHA from fish oil) have solid research supporting their ability to reduce inflammation and improve mobility in dogs with osteoarthritis. Some studies also suggest avocado and soybean unsaponifiables (ASUs) may support joint comfort.

On the other hand, glucosamine and chondroitin — long considered staples — show mixed clinical results. Some pets seem to benefit, while others show little measurable improvement. Because of this variability, we recommend evaluating each pet individually rather than assuming every joint supplement will work the same way.

An older dog struggling to get up the stairs, for example, may benefit from a veterinarian-recommended omega-3 supplement as part of a comprehensive plan that includes weight management and exercise adjustments.

Do Skin and Coat Supplements Help?

If your pet has dry, flaky skin or a dull coat, certain supplements may help.

Omega-3 and omega-6 fatty acids support skin barrier function and coat shine. They also help regulate inflammation, which may benefit pets with mild allergic tendencies. While supplements won’t replace allergy treatment when needed, they can provide supportive care.

A daily fish oil supplement, when dosed properly, can often improve coat texture and reduce dryness over time.

Are Digestive and Immune Supplements Useful?

Digestive supplements, especially probiotics, have gained popularity in recent years — and for good reason.

Probiotics help maintain a healthy balance of beneficial bacteria in the gut. They can be particularly helpful after antibiotic treatment, during periods of stress, or when transitioning diets. However, product quality matters greatly. Not every probiotic on the shelf contains effective strains in adequate amounts.

For instance, a dog recovering from gastrointestinal upset may benefit from a veterinarian-recommended probiotic to help normalize stool consistency and support gut balance.

Which Pet Supplements Don’t Deliver as Promised?

Just because a label makes bold claims doesn’t mean the science backs it up.

Are Multivitamins Always Necessary?

In most cases, healthy pets eating a complete and balanced commercial diet do not need multivitamins. Organizations like the Association of American Feed Control Officials (AAFCO) establish nutritional standards that reputable pet foods already meet.

Adding unnecessary vitamins can actually create imbalances. Fat-soluble vitamins, such as Vitamin D, can accumulate in the body if over-supplemented. That’s why we advise against adding multivitamins without a specific veterinary recommendation.

Do “Miracle” Supplements Exist?

If a product claims to cure arthritis, eliminate allergies, or dramatically reverse aging, it’s time to pause.

Supplements support health — they don’t cure disease. Effective treatment plans often combine diet, medication when needed, lifestyle adjustments, and sometimes targeted supplementation. Any product promising instant transformation should raise a red flag.

How Do You Choose Safe and Effective Pet Supplements?

Before purchasing any supplement, take these steps:

Talk to your veterinarian. Your pet’s age, weight, medical history, and diet all matter.
Look for reputable manufacturers and quality certifications, such as the National Animal Supplement Council (NASC) seal.
Avoid products that hide ingredient amounts behind “proprietary blends.”
Monitor your pet for any side effects and report changes promptly.

Most importantly, tailor supplementation to a specific goal rather than adding products “just in case.”

Why Trust Gardens Animal Hospital?

At Gardens Animal Hospital, we’ve served pets and families in Palm Beach Gardens since 1975. Our veterinary team combines decades of hands-on clinical experience with ongoing education to stay current with evidence-based medicine. We carefully evaluate the safety, effectiveness, and quality of the supplements we recommend.

Through our in-hospital and online pet pharmacy, we offer veterinarian-approved supplements that meet high manufacturing standards. We don’t believe in one-size-fits-all advice — we believe in personalized care built on trust, science, and a genuine love for animals.

If you’re considering pet supplements, we’re happy to help you choose wisely and confidently.