heart support
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Stress is often viewed as a behavioural issue: a nervous dog pacing or a cat hiding. But stress is also physiological.
Concern arises when stress becomes frequent or long-lasting
When a pet experiences stress, the body releases hormones like cortisol and adrenaline. These chemicals increase heart rate and blood pressure to prepare the body to respond. According to the American Veterinary Medical Association (AVMA) and research published in the Journal of Veterinary Behavior, this short-term response is normal and protective. The concern arises when stress becomes frequent or long-lasting.
Over time, repeated activation of this response may influence how the heart and circulatory system function.
The cardiovascular system includes not just the heart muscle but also the blood vessels and the efficiency of circulation. During stress, blood vessels narrow, and the heart works harder to pump blood. Research referenced in the Journal of the American Veterinary Medical Association (JAVMA) suggests that repeated elevations in heart rate and blood pressure can increase cardiovascular workload.

While this does not mean stress directly causes heart disease, prolonged strain may influence recovery after activity and overall circulatory balance, especially in aging pets or those with existing concerns.
Stress-related changes are often subtle. Pets instinctively hide discomfort, and signs like reduced stamina, altered sleep, or quieter behaviour are commonly attributed to age or personality. Chronic stressors, such as environmental changes, loud noises, multi-pet households, or ongoing health issues, can quietly influence physiological markers like heart rate variability, as discussed in Frontiers in Veterinary Science.
Because these changes develop gradually, observation and routine veterinary checkups are key.
Pet parents may consider discussing additional heart support with their veterinarian if their pet is aging, experiencing long-term stress, or managing a diagnosed cardiac condition.

Alongside veterinary care, some families explore supportive options such as NHV Matricalm or NHV Lesstress for promoting relaxation. Additionally, the NHV Heart Murmur Support Kit can be part of a broader wellness plan. These products are not intended to diagnose or treat disease, but may complement a veterinarian-guided approach focused on balance.
Ultimately, our pets feel the world just as deeply as we do – and their hearts often carry the weight of that stress. By being proactive and keeping their heart strong, you’re setting them up for long-term success.
For more natural pet wellness tips and ongoing NHV news, sign up for the NHV newsletter. You can also join our new community on X for pet care wellness tips in a friendly format. Join us as we protect pet hearts around the world.
heart support
Hearty Heart & Turmeric
bundle and save with pet expert kits
3 month supply for a small to medium size pet.
What is it?
NHV’s Heart Murmur Support Kit contains beneficial natural ingredients for heart failure in dogs and cats and offers a little extra support when your little one really needs it!
How Does it Work?
Why Should I Trust It?
Easy-to-give natural supplements formulated by vets.
What is it?
NHV’s Heart Murmur Support Kit contains beneficial natural ingredients for heart failure in dogs and cats and offers a little extra support when your little one really needs it!
How Does it Work?
Why Should I Trust It?
Easy-to-give natural supplements formulated by vets.
If your four-legged friend has a swollen belly, is easily tired and has labored breathing, these could be early signs that they may have a heart murmur.
Unfortunately, there is no cure for a heart murmur in dogs, but you can improve their quality of life and help manage symptoms if caught early. Certain smaller breeds of dogs like American Cocker Spaniels, Boston Terriers, Cavalier King Charles Spaniels, Chihuahuas, Dachshunds, Maltese, Poodles, and Papillion, are more prone to developing heart disease than many larger breeds.
With heart murmurs in cats, breeds like American Shorthairs, British Shorthairs, Main Coons, Persians, and Siamese are prone to inheriting cardiomyopathy (heart becomes enlarged and weakens).
Your pet’s health and well-being mean the world to us. For our heart support kits, we have worked with a holistic vet and a master herbalist to formulate gentle yet effective remedies to focus on the areas of the body most affected by a weakened heart. For any questions or concerns about heart murmurs in dogs and cats, don’t hesitate to reach out to an NHV Pet Expert - we are always happy to help!
Made with the finest, organically grown, or ethically harvested herbs. Made specifically for pets, vet-formulated and vet approved.
Select your pet's weight to determine the correct dose.
To be taken twice daily. Determine your pet’s weight and then use the easy chart below to determine the correct dose. This is the minimum dosage.
Pet's Weight Dosage
0 - 15 lb = 0.5 ml
16 - 30 lb = 1.0 ml
31 - 45 lb = 1.5 ml
46 - 60 lb = 2.0 ml
61 - 75 lb = 2.5 ml
Over 75 lb = 3.0 ml
How to Administer
Shake well before use. The easiest method is to use the dropper provided and place the drops into your pet’s food or favorite treat. You can also use the dropper and squirt directly into the pet’s mouth. Some pets can be finicky, if this occurs consider hiding the drops in foods most pet’s love such as fish, chicken or yogurt or a favorite treat. If your pet only eats dry food then soak a few kibbles at feeding time.
For Best Results
Herbal dietary supplements are beneficial to the health and well-being of your pet and are safe for long-term use. Every pet responds to natural herbal supplements differently, therefore it is important to be consistent and administer the product daily. Supplements generally take two to four weeks to take effect, however this will vary from one animal to the next.
Product Storage
All NHV Natural Pet Products are pure herbal extracts and contain no artificial additives, preservatives or coloring. Shelf life after opening is 6 months and must be refrigerated after opening.
Cautions and Contraindications
Do not use in pregnant or nursing animals.
All information provided by NHV Natural Pet Products is for educational purposes only.
If your four-legged friend has a swollen belly, is easily tired and has labored breathing, these could be early signs that they may have a heart murmur.
Unfortunately, there is no cure for a heart murmur in dogs, but you can improve their quality of life and help manage symptoms if caught early. Certain smaller breeds of dogs like American Cocker Spaniels, Boston Terriers, Cavalier King Charles Spaniels, Chihuahuas, Dachshunds, Maltese, Poodles, and Papillion, are more prone to developing heart disease than many larger breeds.
With heart murmurs in cats, breeds like American Shorthairs, British Shorthairs, Main Coons, Persians, and Siamese are prone to inheriting cardiomyopathy (heart becomes enlarged and weakens).
Your pet’s health and well-being mean the world to us. For our heart support kits, we have worked with a holistic vet and a master herbalist to formulate gentle yet effective remedies to focus on the areas of the body most affected by a weakened heart. For any questions or concerns about heart murmurs in dogs and cats, don’t hesitate to reach out to an NHV Pet Expert - we are always happy to help!
Made with the finest, organically grown, or ethically harvested herbs. Made specifically for pets, vet-formulated and vet approved.
Select your pet's weight to determine the correct dose.
To be taken twice daily. Determine your pet’s weight and then use the easy chart below to determine the correct dose. This is the minimum dosage.
Pet's Weight Dosage
0 - 15 lb = 0.5 ml
16 - 30 lb = 1.0 ml
31 - 45 lb = 1.5 ml
46 - 60 lb = 2.0 ml
61 - 75 lb = 2.5 ml
Over 75 lb = 3.0 ml
How to Administer
Shake well before use. The easiest method is to use the dropper provided and place the drops into your pet’s food or favorite treat. You can also use the dropper and squirt directly into the pet’s mouth. Some pets can be finicky, if this occurs consider hiding the drops in foods most pet’s love such as fish, chicken or yogurt or a favorite treat. If your pet only eats dry food then soak a few kibbles at feeding time.
For Best Results
Herbal dietary supplements are beneficial to the health and well-being of your pet and are safe for long-term use. Every pet responds to natural herbal supplements differently, therefore it is important to be consistent and administer the product daily. Supplements generally take two to four weeks to take effect, however this will vary from one animal to the next.
Product Storage
All NHV Natural Pet Products are pure herbal extracts and contain no artificial additives, preservatives or coloring. Shelf life after opening is 6 months and must be refrigerated after opening.
Cautions and Contraindications
Do not use in pregnant or nursing animals.
All information provided by NHV Natural Pet Products is for educational purposes only.
anxiety & aggression support
Natural Help for Stress Reduction, Anxiety Relief, Behavioral Problems, and Aggression in Cats
buy 2 and save $3
3 month supply for a small to medium size pet
What is it?
Matricalm is an all-natural supplement that provides anxiety and stress relief in cats and promotes calm behavior.
How Does it Work?
Why Should I Trust It?
Vet-approved dietary supplement crafted with the finest natural ingredients.
What is it?
Matricalm is an all-natural supplement that provides anxiety and stress relief in cats and promotes calm behavior.
How Does it Work?
Why Should I Trust It?
Vet-approved dietary supplement crafted with the finest natural ingredients.
Help reduce aggressive behavior and provide anxiety and stress relief for your cat with Matricalm, a natural herbal product designed to help reduce excitability in your pet. Cats can become anxious or aggressive when exposed to other animals or to people they are unfamiliar with. When this occurs they may hiss, scratch, howl, or urinate inappropriately.
It’s important to remember that a significant cause of illness in pets results from stress. Helping to keep your cat stress free can help keep them healthier for longer. NHV Pet Experts also often recommend Matricalm for cats dealing with FIV, cancer, kidney issues, hyperthyroidism, and more.
See how NHV Matricalm helped kitty Kimba with yowling and stress.

Chamomile – Contains sedative properties. Chamomile also helps the immune system and has a strong affinity for the nervous system.
Passion Flower – An effective, non-addictive sedative. It helps increase gamma-aminobutyric acid (GABA) in the brain, which helps cause a feeling of relaxation. Passion Flower also has strong anti-inflammatory and pain-relieving properties.
Lemon Balm – An aromatic herb used for nervous disorders, excitability, and anxiety. In addition, lemon balm helps lower blood pressure.
Valerian – Helps stop heart palpitations, relaxes spasms, relieves pain, and regulates the nervous system. Valerian also helps improve sleep latency and sleep quality.
Hops – Tension, anxiety, and stress relief in cats. Hops have traditionally been used to help with mood disturbances, such as restlessness and anxiety.
Select your pet's weight to determine the correct dose.
To be taken twice daily. Determine your pet’s weight and then use the easy chart below to determine the correct dose. This is the minimum dosage.
Pet's Weight Dosage
0 - 15 lb = 0.5 ml
16 - 30 lb = 1.0 ml
31 - 45 lb = 1.5 ml
46 - 60 lb = 2.0 ml
61 - 75 lb = 2.5 ml
Over 75 lb = 3.0 ml
How to Administer
Shake well before use. The easiest method is to use the dropper provided and place the drops into your pet’s food or favorite treat. You can also use the dropper and squirt directly into the pet’s mouth.
Some pets can be finicky. If this occurs, consider hiding the drops in foods most pets love, such as fish, chicken, yogurt or a favorite treat. If your pet only eats dry food, then soak a few kibbles at feeding time.
For Best Results
Herbal dietary supplements are beneficial to the health and well-being of your pet and are safe for long-term use. Every pet responds to natural herbal supplements differently. Therefore, it is important to be consistent and administer the product daily. Supplements generally take two to four weeks to take effect; however, this interval will vary from one animal to the next.
Product Storage
All NHV Natural Pet Products are pure herbal extracts and contain no artificial additives, preservatives, or coloring. Shelf life after opening is six months, and it must be refrigerated after opening.
Cautions and Contraindications
Do not use Matricalm for cats as stress relief in pregnant or nursing animals. Speak to your vet before using our products. A second visit is recommended if your pet’s condition does not improve or deteriorates after the continued use of the supplements.
All information provided by NHV Natural Pet Products is for educational purposes only.
Help reduce aggressive behavior and provide anxiety and stress relief for your cat with Matricalm, a natural herbal product designed to help reduce excitability in your pet. Cats can become anxious or aggressive when exposed to other animals or to people they are unfamiliar with. When this occurs they may hiss, scratch, howl, or urinate inappropriately.
It’s important to remember that a significant cause of illness in pets results from stress. Helping to keep your cat stress free can help keep them healthier for longer. NHV Pet Experts also often recommend Matricalm for cats dealing with FIV, cancer, kidney issues, hyperthyroidism, and more.
See how NHV Matricalm helped kitty Kimba with yowling and stress.

Chamomile – Contains sedative properties. Chamomile also helps the immune system and has a strong affinity for the nervous system.
Passion Flower – An effective, non-addictive sedative. It helps increase gamma-aminobutyric acid (GABA) in the brain, which helps cause a feeling of relaxation. Passion Flower also has strong anti-inflammatory and pain-relieving properties.
Lemon Balm – An aromatic herb used for nervous disorders, excitability, and anxiety. In addition, lemon balm helps lower blood pressure.
Valerian – Helps stop heart palpitations, relaxes spasms, relieves pain, and regulates the nervous system. Valerian also helps improve sleep latency and sleep quality.
Hops – Tension, anxiety, and stress relief in cats. Hops have traditionally been used to help with mood disturbances, such as restlessness and anxiety.
Select your pet's weight to determine the correct dose.
To be taken twice daily. Determine your pet’s weight and then use the easy chart below to determine the correct dose. This is the minimum dosage.
Pet's Weight Dosage
0 - 15 lb = 0.5 ml
16 - 30 lb = 1.0 ml
31 - 45 lb = 1.5 ml
46 - 60 lb = 2.0 ml
61 - 75 lb = 2.5 ml
Over 75 lb = 3.0 ml
How to Administer
Shake well before use. The easiest method is to use the dropper provided and place the drops into your pet’s food or favorite treat. You can also use the dropper and squirt directly into the pet’s mouth.
Some pets can be finicky. If this occurs, consider hiding the drops in foods most pets love, such as fish, chicken, yogurt or a favorite treat. If your pet only eats dry food, then soak a few kibbles at feeding time.
For Best Results
Herbal dietary supplements are beneficial to the health and well-being of your pet and are safe for long-term use. Every pet responds to natural herbal supplements differently. Therefore, it is important to be consistent and administer the product daily. Supplements generally take two to four weeks to take effect; however, this interval will vary from one animal to the next.
Product Storage
All NHV Natural Pet Products are pure herbal extracts and contain no artificial additives, preservatives, or coloring. Shelf life after opening is six months, and it must be refrigerated after opening.
Cautions and Contraindications
Do not use Matricalm for cats as stress relief in pregnant or nursing animals. Speak to your vet before using our products. A second visit is recommended if your pet’s condition does not improve or deteriorates after the continued use of the supplements.
All information provided by NHV Natural Pet Products is for educational purposes only.
Hearty Heart -Helps support pets suffering heart conditions.
Hearty Heart -Helps support pets suffering heart conditions.
Published: February 23, 2026