How to Choose the Best Supplements for Your Dog or Cat

A New Way to Care for Our Companions
They sleep on our couches, greet us at the door, and share our joys and challenges. Our dogs and cats have become true family members, and it is only natural that the way we view their health evolves alongside them.
In recent years, pet nutrition has undergone a profound transformation. We now know that proper nutrition is the foundation of long-term health. However, we also understand that the needs of a growing puppy are not the same as those of a 12-year-old senior cat. Between those stages lies a lifetime of changes, seasons, physical demands, and emotional challenges that can influence what the body needs.
This is where dietary supplements become valuable—not to replace a high-quality diet, but to support it where food alone may not be enough.
At Siku Lab, our approach is built on a simple belief: every animal deserves formulas designed specifically for them, carefully selected ingredients, effective dosages, and complete transparency. This guide reflects that philosophy.
Important
- Dietary supplements do not replace veterinary care or a balanced diet.
- If your pet has a medical condition or is receiving treatment, consult your veterinarian before introducing supplements.
1. Why Consider Supplements for Your Dog or Cat?
A complete, high-quality diet is the foundation of health. However, that foundation does not automatically adapt to every animal, every life stage, or every unique situation.
A Complete Diet: An Excellent Foundation, But Not Universal
Complete pet foods are designed to meet basic nutritional requirements. In most cases, they are sufficient to maintain good health. However, “basic” does not mean “ideal for every situation.”
A food formulated for a healthy adult animal may not address the needs of:
- A senior pet experiencing joint wear
- An athletic dog recovering from intense activity
- A cat with sensitive skin going through a difficult shedding season
Factors That Influence Nutritional Needs
Several factors directly affect your pet’s nutritional requirements:
- Age: growing puppy or kitten, healthy adult, slowing senior
- Activity level: couch companion or sporting dog
- Physiological state: pregnancy, lactation, recovery
- Environment: stress, moving homes, climate changes
- Specific sensitivities: digestive, skin, or joint concerns
- Natural aging processes
When Supplementation Becomes Relevant
Targeted supplementation may be helpful in situations such as:
- Supporting mobility and joint comfort in senior or athletic pets
- Maintaining a thick, shiny coat and healthy skin during seasonal changes
- Supporting the gut microbiome during dietary transitions or stress
- Strengthening natural defenses before winter or during periods of fatigue
- Supporting growth and recovery in highly active animals
2. Major Supplement Categories: Which Ingredients for Which Needs?
Understanding what a supplement contains and why is the first step to making the right choice. Here are the four main categories of active ingredients, their roles, and the signs that may indicate a need.
| Target Need | Key Ingredients |
|---|---|
| Mobility & Joint Health | Glucosamine, Chondroitin, MSM, Green-Lipped Mussel |
| Skin & Coat | Omega-3s (EPA/DHA), Biotin, Zinc |
| Digestion & Microbiome | Probiotics, Prebiotics (FOS, MOS) |
| Vitality & Natural Defenses | Vitamins A, C, E, Adaptogenic Plants |
Mobility and Joint Support
Joint sensitivity is not limited to older dogs. Large breeds during growth, cats that jump and land repeatedly, and highly active animals all place daily demands on their cartilage and connective tissues. Over time, this natural wear and tear begins to make itself felt.
- Glucosamine & Chondroitin
Natural components of joint cartilage. When used as supplements, they nourish this tissue and help maintain its structural integrity. - MSM (Methylsulfonylmethane)
A naturally occurring sulfur compound that helps preserve the flexibility of the tissues surrounding the joints. - New Zealand Green-Lipped Mussel
Rich in unique fatty acids, it provides complementary support that is highly valued for everyday mobility.
Skin Health and Coat Shine
The skin is your pet’s first protective organ, and the condition of the coat is often a reflection of it. A dull, dry coat or excessive shedding may indicate a lack of essential nutrients that diet alone does not always fully provide.
- Omega-3 Fatty Acids (EPA & DHA)
Essential fatty acids that the body cannot produce on its own. Sourced from carefully selected marine ingredients (wild salmon oil, sardines, anchovies), they nourish the skin barrier from within and help promote a shiny, dense coat. - Biotin & Zinc
These micronutrients play a direct role in keratin synthesis, the protein that forms hair and claws. Their targeted supplementation contributes to supple, resilient skin.
Digestive Microbiome Balance
The gut is home to an ecosystem of billions of microorganisms that play a central role in nutrient absorption, immunity, and even the animal’s emotional state. This delicate balance can be disrupted by a change in diet, stress, antibiotic treatment, or even a simple trip.
Probiotics
Selected strains of beneficial bacteria (lactobacilli, bifidobacteria) that help reinforce the intestinal flora and support digestive comfort.
Prebiotics (FOS & MOS)
Soluble fibres that serve as food for beneficial bacteria, encouraging their natural growth and strengthening the resilience of the microbiome.
Vitality and Natural Defenses
Certain periods in an animal’s life make them more vulnerable to fatigue or external stressors: winter, environmental changes, and aging, for example. Targeted antioxidant support can help the body cope with these challenges.
Antioxidant Vitamins (A, C, E)
These vitamins help protect cells from the effects of free radicals, which are responsible for premature cellular aging.
Adaptogenic Plants
Inspired by Nordic and boreal herbal traditions, these plants help the body better manage everyday environmental stress.
3. How Can You Recognize a Quality Supplement? The Criteria That Truly Matter
The pet supplement market is expanding rapidly, bringing with it both excellent formulas and disappointing products. Learning how to read a label, understand a dosage, and evaluate ingredient sourcing are essential habits to develop.
Ingredient Transparency
A good product begins with a clear, easy-to-read label. The ingredient list should clearly identify the sources used, without vague terms or generic descriptions that obscure the true nature of the formula.
- Fewer ingredients is often better: minimalist formulas that focus on the essentials are generally a sign of purity and careful formulation.
- Avoid artificial colourings, synthetic flavourings, and fillers that provide no nutritional value.
The Concentration of Active Ingredients
This is the most overlooked criterion, yet also the most important. What matters is not the size of the container, but the actual amount of active compounds provided in the recommended serving, expressed in milligrams.
A product marketed at an attractive price may require three times the dosage of a competing product to achieve a comparable effect. The true cost per active dose is the only meaningful indicator when comparing two products fairly.
Ingredient Origin and Traceability
The source of ingredients is a direct indicator of both safety and effectiveness. For marine oils, this means sustainable fishing practices, responsible extraction methods, and rigorous testing to ensure the absence of contaminants such as heavy metals and PCBs.
More broadly, a brand that prioritizes locally sourced ingredients or ingredients sourced close to its home territory sends a strong signal about its quality standards.
4. A Practical Guide to Incorporating Supplements into Your Pet’s Routine
Even the best supplement can be poorly tolerated if introduced too abruptly. Following a few simple guidelines can make all the difference in ensuring optimal absorption and avoiding resistance.
The Art of Taking Things Gradually
- Week 1: Start with half the recommended dose, once a day.
- Week 2: If everything is going well, increase to the full recommended dose.
- Goal: Allow the digestive system time to adapt before reaching the full dosage.
The Golden Rule: Gradual Introduction
Just as with changing your pet’s food, your pet’s digestive system needs time to adapt to new concentrations of nutrients. This is particularly true for oils (omega-3s) and probiotics. Introducing them gradually helps prevent minor digestive disturbances and ensures better absorption.
Tips for Picky Pets
Cats, in particular, may refuse food if its smell or texture has changed even slightly. A few simple adjustments can help:
For Oils
Mix the dose into a small portion of wet food or a pet-safe broth to help mask the smell.
For Powders
Mix them thoroughly into the meal. For especially reluctant cats, placing a tiny amount on top of a paw will naturally encourage them to ingest it while grooming.
For All Supplements
Consistency is key. The effects of supplementation on coat quality or mobility are generally observed after 3 to 4 weeks of consistent use.
Conclusion: A Personalized Approach Supported by Carefully Crafted Formulas
aking care of your dog or cat means giving them a life in which they can truly thrive, not simply survive. When chosen wisely and incorporated properly, dietary supplements are one of the most accessible ways to contribute meaningfully to their well-being.
But not all supplements are created equal. The quality of the ingredients, the precision of the dosages, and the transparency of the formulas make the difference between a product that genuinely improves your pet’s daily life and one that simply gathers dust on a shelf.
That is why we created Siku Lab.
Discover Siku Lab Formulas
- Carefully sourced ingredients and verified active dosages.
- Formulas designed specifically for dogs and cats—never generic, always targeted.
- Explore our complete range or speak with our team for personalized advice.

