Dog Calming Supplement With Gut Health Support
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True Calm Starts In Your Dog’s Gut.
StressK9 is a science-backed, vet recommended calming supplement that supports the gut–brain axis and helps dogs feel more relaxed, resilient and at ease.
If your dog struggles with separation anxiety, reactivity, restlessness, or stress-related itching and digestion issues, it’s likely their gut and nervous system need extra support.
StressK9 is a daily calming supplement, designed to support the gut–brain axis, ease stress, and promote emotional balance in dogs of all life stages and breeds.
While most calming products focus only on behaviour, StressK9 pairs soothing botanicals with our unique Bio-K9® blend of Pre, Para-Pro and Postbiotics to support mood, digestion, and nervous system health - delivered in an easy-to-feed chew dogs love. Always consult your veterinarian for specific advice for your dog.
Nutritional Yeast, Valerian, Bio-K9® (Fermented Pre, Para-Pro and Postbiotic blend containing Lactobacillus acidophilus D2, Saccharomyces cerevisiae, Carrot fibre), Kakadu Plum, Tilia Cordata, L-Theanine, Sunflower Oil, Organic Vegetable Glycerine, Tapioca Starch, Gelatin, Water, Beef Bone Broth, Salt, Sunflower Lecithin.
Simply feed 1 chew per 5kg of your dog’s body weight daily.
Our Stress Chews can be offered like a treat - most dogs love the taste! For best results, introduce gradually over a 14 days, and feed consistently. Improvements may be noticed within days, but best results are usually seen after 4–6 weeks of daily use.
While some dogs show changes quickly, best results are typically seen after 6-12 weeks of daily use.
With Auto-Ship, you never have to worry about running out when you need it most.
You’ll receive your chosen quantity of StressK9 at your chosen frequency.
You’ll also save 10% on the price with every single delivery and receive free shipping. Those savings add up, especially if you have multiple horses.
You can cancel or edit your Auto-Ship service at any time.
Support Your Dog's
Inner Calm
70% of your dog’s immune system lives in the gut, and emerging research links gut health to behaviour, skin, and overall wellbeing.
A well-balanced gut is the key to building emotional resilience and helping your dog feel calm, confident and stress-free.
The benefits of
StressK9
The Benefits Of
StressK9
Calmer, Settled Mood
Less Reactivity & Restlessness
Separation Anxiety Support
Reduced Stress-Linked Itching
Better Gut-Brain Balance
Improved Sleep & Recovery
Natural Daily Stress Relief
General Behaviour Improves
Ingredients
Developed with Experts.
Backed By Science.
StressK9 was developed with veterinarians, microbiologists and canine nutritionists to support gut-brain balance and emotional wellbeing in dogs.
Each ingredient is carefully selected to deliver calm and resilience with added gut support - backed by research and proven to work where it matters most.
A natural source of B vitamins that supports nervous system function, mood regulation and overall vitality, plus aids in palatability with a great flavour.
A calming herbal extract used for centuries to support relaxation, reduce stress and improve sleep quality without sedating your dog.
Our powerful gut health complex, fermented for optimal potency. Supports digestion, immunity and the gut–brain axis to help dogs manage stress from within.
An Australian superfruit packed with Vitamin C and antioxidants to help reduce oxidative stress and support immune resilience.
Also known as the Linden flower, this gentle botanical helps calm anxiety, ease nervous tension, reduces insomnia symptoms and supports emotional balance.
An amino acid found in green tea that promotes relaxation and balanced mood without drowsiness, ideal for managing mild anxiety symptoms during times of elevated stress.
Expeller pressed to retain essential fatty acids that support skin, coat and brain health, without adding unnecessary chemicals or heat during extraction.
A plant-derived ingredient that keeps chews soft and moist, improving palatability and shelf life without added sugars.
A grain-free, easy-to-digest binding agent that helps form the chew texture while being gentle on sensitive stomachs.
A natural source of collagen that supports joint and gut health while helping to create a chewy texture dogs enjoy.
Used during formulation to activate ingredients and create the right consistency and texture for chews.
A nourishing, flavourful base rich in amino acids and minerals that supports joint, gut and immune health while adding a yummy flavour that dogs love.
Included in safe, minimal amounts to balance flavour and contribute to natural electrolyte function.
A natural emulsifier that helps ingredients mix evenly while supporting cognitive and cellular health.
Your Dog's
Health Journey
Month 1
Gut starts to rebalance
Slightly calmer behaviour
Improved sleep patterns
Month 2
Less barking & restlessness
Reduced nervous energy
Brighter, more relaxed mood
Month 3
Improved resilience to stress
More predictable behaviour
Overall emotional balance
Consistency Is Everything
Stick with it. It can take time for you to notice the impact of the natural calming ingredients in Stress K9 Chews. Most dogs see results around the 3 month mark, so don’t give up early.
Consistency is the key to lasting change.
Gut-Loving Stress Relief For Dogs
StressK9 vs Regular Calming Supplements
Grain Free. No Hidden Nasties.
Lactose Free. Gentle On Sensitive Tummies.
Active Ingredients At Effective Levels.
Includes Postbiotics, Prebiotics & Paraprobiotics.
Contains Amino Acids & Digestive Enzymes.
Safe Daily Support For All Breeds & Ages.
Multiple Benefits: Anxiety, Digestion, Skin & More.
BRAND B
Low
BRAND C
Low
BRAND B
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BRAND C
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Hundreds Of Incredible Transformations
Don't just take our word for it. Hear it from our regular customers.
Dog Owner Approved
Real and honest reviews from dog owners using StressK9
FAQ
Poseidon Animal Health was founded in Australia in 2017, with a focus on targeted, evidence-based gut health solutions. After creating our successful equine range, we applied that same science-led approach to canine health. We are based in the Illawarra Region of NSW, with manufacturing facilities in Australia, New Zealand and USA. We also export to Europe, the Middle East and Asia.
StressK9 is formulated to support dogs experiencing anxiety, stress, or mood-related behaviours - while also strengthening gut health, which is closely linked to emotional balance.
Developed especially for dogs using the same science-backed approach as our bestselling equine range, StressK9 combines high levels of active ingredients, calming botanicals and our gut-supporting canine-specific Bio-K9® blend to help promote better behaviour, skin health, immune function, and digestive balance.
StressK9 contains our proprietary Bio-K9® gut health blend, along with calming botanicals such as Valerian, Tilia Cordata, Kakadu Plum, and L-Theanine. Nutritional Yeast, Essential Vitamins, and Amino Acids are included to help reduce stress and support immune health.
Our chews contain no artificial colours, synthetic additives, or added sugar - and contain our dog-specific Bio-K9® gut health blend for optimal results.
The gut plays a central role in your dog’s ability to manage stress. Home to trillions of microbiota, the gut influences hormone production, immune health, and mood regulation. By supporting the gut with Prebiotics, Para-Probiotics and fermented Postbiotics, StressK9 helps restore microbial balance and encourages calmer behaviour from the inside out.
StressK9 is not just a calming aid - it’s a complete gut and behaviour support formula.
Formulated with our dog-specific Bio-K9 blend
No artificial colours or synthetic ingredients
No added sugar
Developed with experts in microbiology, veterinary science, and all-natural nutrition
Highly palatable and easy to use
It’s daily stress support your dog will actually enjoy taking!
Simply feed 1 chew per 5kg of your dog’s body weight daily.
Our Stress Chews can be offered like a treat - most dogs love the taste! For best results, introduce gradually over a 14 days, and feed consistently. Improvements may be noticed within days, however best results are typically seen after 4-6 weeks of regular use.
It is extremely rare, but if your dog does shows any hesitation or disinterest in consuming our supplements after 1 week of daily feeding attempts, please reach out to our customer service team for helpful advice and further support. We’re here to help your dog on the journey to a stress-free life.
Absolutely! In fact, they’re designed to work even better together.
Daily gut support with DigestiveK9 lays the foundation for strong digestion and microbial balance.
StressK9 adds targeted ingredients to help pups during periods of heightened stress or anxiety.
Used together, they support both the cause and the symptoms of canine stress.
Stress looks different in every dog, but some common signs include:
Excessive barking or howling
Panting or drooling when it’s not hot
Cowering, trembling, or restlessness
Destructive behaviour
Obsessive licking or chewing
Aggression or withdrawal
If you’re noticing these behaviours, StressK9 may offer the extra support they need.
