Stress K9 Chews
Dog Calming Supplement With Gut Health Support
- Anxiety & Mood
- Routine Changes
- Healthy Stress Response
1 - CHOOSE YOUR PACK SIZE
True Calm Starts In Your Dog’s Gut.
StressK9 is a science-based, 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 situational 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 temporary relief, StressK9 pairs soothing botanicals with our unique Bio-K9® tri-biotic blend 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.
Tapioca starch, beef bone broth, glycerine, nutritional yeast, valerian root, Bio-K9®, gelatin, carrot fibre, vegan palatant, Tilia cordata, salt, L-theanine, pomegranate, kakadu plum, sunflower oil, soy lecithin, potassium sorbate, natural smoke aroma, vitamin E.
Simply feed 1 chew per 5kg of your dog’s body weight in a 24 hour period, as required during times of increased stress.
Use for situational stress, or daily for up to 12 weeks. Thereafter, use periodically as required to manage stress triggers.
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.
Our Hero Ingredients
Developed with Experts.
Backed By Science.
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.
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.
A potent, antioxidant-rich ingredient that supports immune and gut health while helping to reduce oxidative stress, promote calm behaviour, and support mood balance and overall resilience.
An Australian superfruit packed with Vitamin C and antioxidants to help reduce oxidative stress and support immune resilience.
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 Tri-Biotic Gut Support.
Contains Amino Acids & Fermentable Fibre.
Safe For All Breeds & Life Stages.
OTHER BRANDS
Low
OTHER BRANDS
Low
OTHER BRANDS
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 combines calming botanicals including Valerian and Tilia Cordata with L-Theanine, nutritional yeast, antioxidants and our unique Bio-K9® gut health blend. Together, these ingredients provide targeted nutritional support for the nervous system, normal stress response and gut-brain connection.
Your dog’s gut and brain are closely connected. Stress can affect the gut, while an imbalanced gut can make it harder for dogs to cope with everyday stressors. That’s why StressK9 combines calming ingredients with Bio-K9® to support both sides of the gut-brain connection.
StressK9 takes a multi-target approach, combining botanicals traditionally used for their calming properties with Nutritional Yeast, Valerian, L-Theanine, Kakadu Plum, antioxidants and our Bio-K9® gut health blend. This provides targeted nutritional support for both the nervous system and gut-brain connection when your dog needs a little extra help.
Feed according to your dog’s bodyweight, following the feeding guide on our pack. StressK9 is designed for situational use and can be used around occasional stressful events or daily during periods of increased stress, for up to 12 weeks at a time.
Yes, StressK9 can be fed daily for up to 12 weeks when your dog needs additional stress support.
After 12 weeks, we recommend discontinuing daily use and returning to StressK9 periodically only when needed, rather than keeping it in their everyday routine long-term.
Absolutely.
DigestiveK9 provides ongoing daily gut support, while StressK9 adds targeted nutritional support during periods of increased stress. They can be fed together for up to 12 weeks, before continuing DigestiveK9 on its own and returning to StressK9 periodically when needed.
Yes!
In September 2026 we refined the formula to make the chews softer, tastier and easier to eat, particularly for smaller and fussier dogs. Importantly, the key active ingredients responsible for StressK9’s calming support
remain at the same inclusion levels as before, so you can rest assured your dog will receive the same trusted calming support they have experienced with us previously.
Every dog is different. Signs can include excessive barking, panting when they’re not hot, trembling, restlessness, hiding, destructive behaviour, obsessive licking or difficulty settling.
StressK9 provides additional nutritional support during times when your dog may find it harder to cope.
