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Top 5 Behavioral & Calming Supplements for Cats in Canada 2025, Vet-Reviewed Guide to Pheromones, Natural Blends & Evidence-Based Options

Published on Wednesday, August 20, 2025

Behavioral and calming supplements for cats include pheromone-based products, natural herbal blends, amino-acid and nutrient support, and other non-prescription options designed to reduce stress, separation anxiety, and noise phobia. Popular formulations available in Canada in 2025 mix familiar ingredients such as L-tryptophan, L-theanine, chamomile, and, where permitted by regulation, CBD. Canadian consumers favor solutions that are simple to use (diffusers, chews, or capsules), backed by veterinary guidance or published research, and compliant with local product and labeling rules. Demand is driven by busy urban lifestyles, multi-cat households, and a desire for non-pharmaceutical approaches that integrate with behavior modification and environmental management. Availability through pet clinics, national retailers, and online stores also influences choices, with purchasers prioritizing product safety, third-party testing, and clear dosing instructions.

Quick Menu

1. Best Home Diffuser

2. Best Single-Ingredient Oral Supplement

3. Best Daily Chewable Supplement

4. Best Flower Essence Option

5. Best Veterinarian-Formulated Chews

1
BEST HOME DIFFUSER

Feliway Classic Calming Diffuser Refill

FELIWAY

Feliway Classic Calming Diffuser Refill uses a synthetic feline facial pheromone to modify the environment rather than the cat’s chemistry, making it a top choice for household issues like urine marking and inter-cat tension. Its technical advantage is continuous, passive delivery via a plug-in diffuser which can be more cost-effective over time for multi-room or long-term use compared with daily oral supplements. Unlike ingestible options such as Zylkene or VetriScience Composure, Feliway avoids systemic exposure and pairs well with oral products or Rescue Remedy for event-specific situations.

4.3
★★★★☆
  • Mimics facial pheromones

  • Plug-and-forget diffuser

  • Mimics facial pheromones

  • Plug-and-forget diffuser

Review Summary

78%

"Widely regarded as effective for reducing urine marking, scratching and situational stress when used continuously; many users see clear improvement but results vary and ongoing refills are expensive. Best for multi-cat households or chronic stress rather than one-off events."

  • Invisible home-hug

  • Synthetic feline facial pheromone that helps reduce urine marking and general stress.

  • Invisible home-hug

  • Synthetic feline facial pheromone that helps reduce urine marking and general stress.

Increased Safety & Security

Time-Saving Convenience

Feliway Classic Calming Diffuser Refill uses a synthetic feline facial pheromone to modify the environment rather than the cat’s chemistry, making it a top choice for household issues like urine marking and inter-cat tension. Its technical advantage is continuous, passive delivery via a plug-in diffuser which can be more cost-effective over time for multi-room or long-term use compared with daily oral supplements. Unlike ingestible options such as Zylkene or VetriScience Composure, Feliway avoids systemic exposure and pairs well with oral products or Rescue Remedy for event-specific situations.

  • Mimics facial pheromones

  • Plug-and-forget diffuser

  • Invisible home-hug

  • Synthetic feline facial pheromone that helps reduce urine marking and general stress.

  • Plug-in diffuser delivers continuous, room-wide calming for multi-week periods.

  • Mimics facial pheromones

  • Plug-and-forget diffuser

  • Invisible home-hug

  • Synthetic feline facial pheromone that helps reduce urine marking and general stress.

  • Plug-in diffuser delivers continuous, room-wide calming for multi-week periods.

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From 92.99$
2
BEST SINGLE-INGREDIENT ORAL SUPPLEMENT

Zylkene 75mg Capsules

Vetoquinol

Zylkene 75mg Capsules are a single-ingredient, milk-derived calming peptide that offers predictable, veterinarian-friendly oral dosing for situational or short-term anxiety in cats. Their technical advantage is a targeted, systemic mechanism that can be administered around specific stressors (travel, vet visits), and because they’re a single active ingredient they are often easier to evaluate clinically and mix with other treatments. Financially they sit mid-range—typically cheaper than prescription drugs but pricier than mass-market chews—making them a practical bridge between environmental tools like Feliway and daily supplement chews.

4
★★★★☆
  • Milk-protein calm

  • Single-dose capsule

  • Milk-protein calm

  • Single-dose capsule

Review Summary

72%

"Users report a gentle, reliable calming effect for travel and vet visits after consistent use, though it can take several days to work and some cats resist capsules. Generally seen as safe and well-tolerated but not universally fast-acting."

  • Vet-friendly serenity

  • Contains alpha-casozepine, a milk-derived peptide shown to promote relaxation in cats.

  • Vet-friendly serenity

  • Contains alpha-casozepine, a milk-derived peptide shown to promote relaxation in cats.

Increased Safety & Security

Self-Improvement & Personal Growth

Zylkene 75mg Capsules are a single-ingredient, milk-derived calming peptide that offers predictable, veterinarian-friendly oral dosing for situational or short-term anxiety in cats. Their technical advantage is a targeted, systemic mechanism that can be administered around specific stressors (travel, vet visits), and because they’re a single active ingredient they are often easier to evaluate clinically and mix with other treatments. Financially they sit mid-range—typically cheaper than prescription drugs but pricier than mass-market chews—making them a practical bridge between environmental tools like Feliway and daily supplement chews.

  • Milk-protein calm

  • Single-dose capsule

  • Vet-friendly serenity

  • Contains alpha-casozepine, a milk-derived peptide shown to promote relaxation in cats.

  • Oral capsules can be given whole or opened and mixed with food for easy administration.

  • Milk-protein calm

  • Single-dose capsule

  • Vet-friendly serenity

  • Contains alpha-casozepine, a milk-derived peptide shown to promote relaxation in cats.

  • Oral capsules can be given whole or opened and mixed with food for easy administration.

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From 31.88$
3
BEST DAILY CHEWABLE SUPPLEMENT

Pet Naturals Calming Chews for Cats

PET NATURALS

Pet Naturals Calming Chews for Cats deliver a palatable, chewable blend of calming nutrients designed for everyday use, winning favor for owner-friendly administration and wide retail availability. Their financial advantage is accessibility and affordability compared with veterinary-focused formulas, and their chew format often makes dosing simpler than capsules or drops for picky animals. Compared with evidence-backed multi-ingredient veterinary products like VetriScience Composure, Pet Naturals leans more toward convenience and cost-effectiveness for mild, routine stress management.

3.8
★★★☆☆
  • Palatable bite

  • L-theanine boost

  • Palatable bite

  • L-theanine boost

Review Summary

68%

"Many owners like the taste and find it helpful for mild anxiety and situational stress, but effects are modest for more severe behavior issues and some cats show little change. Affordable and easy to administer, but not a cure-all."

  • Treat-like zen

  • Palatable soft-chew format that many cats accept easily, simplifying daily dosing.

  • Treat-like zen

  • Palatable soft-chew format that many cats accept easily, simplifying daily dosing.

Recreational Enjoyment

Increased Safety & Security

Pet Naturals Calming Chews for Cats deliver a palatable, chewable blend of calming nutrients designed for everyday use, winning favor for owner-friendly administration and wide retail availability. Their financial advantage is accessibility and affordability compared with veterinary-focused formulas, and their chew format often makes dosing simpler than capsules or drops for picky animals. Compared with evidence-backed multi-ingredient veterinary products like VetriScience Composure, Pet Naturals leans more toward convenience and cost-effectiveness for mild, routine stress management.

  • Palatable bite

  • L-theanine boost

  • Treat-like zen

  • Palatable soft-chew format that many cats accept easily, simplifying daily dosing.

  • Formulated to support everyday stress relief, travel, and environmental changes.

  • Palatable bite

  • L-theanine boost

  • Treat-like zen

  • Palatable soft-chew format that many cats accept easily, simplifying daily dosing.

  • Formulated to support everyday stress relief, travel, and environmental changes.

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From 19.99$
4
BEST FLOWER ESSENCE OPTION

Bach Rescue Remedy Pet

Bach

Bach Rescue Remedy Pet is a flower essence-based option prized for its safety profile and immediacy for acute stressors (storms, fireworks) without adding systemic pharmacology. Its key advantage is low cost and flexible liquid or spray dosing that can be layered with pheromone diffusers or oral supplements without known drug interactions, appealing to owners seeking a non-pharmaceutical adjunct. While it lacks the targeted biochemical action of products like Zylkene or VetriScience, Rescue Remedy’s gentle profile and low price make it a useful tool in a multimodal calming plan.

3.5
★★★☆☆
  • Flower-essence drops

  • Easy droplet dosing

  • Flower-essence drops

  • Easy droplet dosing

Review Summary

60%

"Mixed opinions: some owners notice short-term calming during storms or travel, while others report no measurable effect; praised for safety and ease of use. Considered a low-risk option for acute stress but backed by limited clinical evidence."

  • Tiny drop hero

  • Homeopathic flower essence blend aimed at acute situational stress relief.

  • Tiny drop hero

  • Homeopathic flower essence blend aimed at acute situational stress relief.

Increased Safety & Security

Time-Saving Convenience

Bach Rescue Remedy Pet is a flower essence-based option prized for its safety profile and immediacy for acute stressors (storms, fireworks) without adding systemic pharmacology. Its key advantage is low cost and flexible liquid or spray dosing that can be layered with pheromone diffusers or oral supplements without known drug interactions, appealing to owners seeking a non-pharmaceutical adjunct. While it lacks the targeted biochemical action of products like Zylkene or VetriScience, Rescue Remedy’s gentle profile and low price make it a useful tool in a multimodal calming plan.

  • Flower-essence drops

  • Easy droplet dosing

  • Tiny drop hero

  • Homeopathic flower essence blend aimed at acute situational stress relief.

  • Available as drops or a spray for direct oral dosing or application to bedding.

  • Flower-essence drops

  • Easy droplet dosing

  • Tiny drop hero

  • Homeopathic flower essence blend aimed at acute situational stress relief.

  • Available as drops or a spray for direct oral dosing or application to bedding.

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-7%24.99$
Suggested Price: 26.97$
5
BEST VETERINARIAN-FORMULATED CHEWS

VetriScience Composure Feline Bite-Sized Chews

Vetri-Science Laboratories

VetriScience Composure Feline Bite-Sized Chews combine a proprietary colostrum calming complex with amino acids and vitamins, positioning them as a veterinary-grade, multi-mechanism daily supplement for behavior support. Their technical advantage is a clinically oriented, multi-ingredient formula that often shows stronger study support than basic OTC chews, though that clinical positioning typically comes with a higher price point. For cat owners seeking a more robust, research-backed daily supplement, Composure is a stronger alternative to budget chews like Pet Naturals and complements environmental measures such as Feliway.

4.2
★★★★☆
  • Bite-sized calm

  • Clinically inspired formula

  • Bite-sized calm

  • Clinically inspired formula

Review Summary

76%

"Commonly praised for palatability and noticeable calming in many cats, especially for situational anxiety and vet trips; a portion of users still report minimal benefit. Veterinary-recommended formula with generally consistent results when dosed properly."

  • Paws-approved chew

  • Veterinarian-developed chewable formula combining calming nutrients to support behavior.

  • Paws-approved chew

  • Veterinarian-developed chewable formula combining calming nutrients to support behavior.

Increased Safety & Security

Self-Improvement & Personal Growth

VetriScience Composure Feline Bite-Sized Chews combine a proprietary colostrum calming complex with amino acids and vitamins, positioning them as a veterinary-grade, multi-mechanism daily supplement for behavior support. Their technical advantage is a clinically oriented, multi-ingredient formula that often shows stronger study support than basic OTC chews, though that clinical positioning typically comes with a higher price point. For cat owners seeking a more robust, research-backed daily supplement, Composure is a stronger alternative to budget chews like Pet Naturals and complements environmental measures such as Feliway.

  • Bite-sized calm

  • Clinically inspired formula

  • Paws-approved chew

  • Veterinarian-developed chewable formula combining calming nutrients to support behavior.

  • Bite-sized, palatable chews designed for easy daily or situational administration.

  • Bite-sized calm

  • Clinically inspired formula

  • Paws-approved chew

  • Veterinarian-developed chewable formula combining calming nutrients to support behavior.

  • Bite-sized, palatable chews designed for easy daily or situational administration.

Order Now
From 22.99$

What the Research Says About Calming Ingredients for Cats

Scientific evidence for common calming ingredients ranges from well-supported (pheromone analogs, certain amino acids) to preliminary (herbal extracts, CBD). Below is a concise, beginner-friendly summary of the main findings, how strong the evidence is, and what it means for everyday use.

Synthetic feline facial pheromone (product class example: Feliway) — Multiple randomized and controlled studies show pheromone analogs can reduce marking, scratching, and signs of environmental stress in many cats, especially when used as part of an overall behavior plan.

L-theanine — Clinical trials in companion animals and small human studies indicate L-theanine can promote relaxation and reduce acute anxiety responses without sedation. Many veterinary supplements combine it with other agents for broader effect.

L-tryptophan — As a serotonin precursor, L-tryptophan supplementation has been associated with reduced reactivity and improved coping in some trials, particularly when paired with behavior modification.

Chamomile and other herbal extracts — Some small studies and historical use support mild calming properties, but clinical evidence is limited and variable; herbal products can be helpful as adjuncts but require attention to purity and dosing.

CBD (where legal and appropriate) — Early trials in dogs and emerging veterinary reports suggest potential for anxiety reduction, but high-quality, species-specific research is still developing. Legal status, product quality, and dosing consistency are major factors in Canada.

Homeopathic formulas (e.g., Rescue Remedy) — Widespread anecdotal use and some user-reported benefits exist, but controlled clinical evidence is limited. These products are often used as gentle adjuncts for mild stress.

Combined formulas (e.g., chewables with multiple actives) — Many commercial chews mix amino acids, botanical extracts, and nutrients; evidence varies product by product. Look for peer-reviewed data or manufacturer-supported trials and ensure compatibility with other treatments.

Practical note — Across ingredient classes, the strongest outcomes come from combining appropriate products with behavior modification, predictable routine, and environmental management. Always consult a veterinarian before starting supplements, particularly for cats on medications or with health conditions.

In the Canadian context, these calming approaches offer practical, non-prescription options to help cats cope with everyday stressors. The five products featured here—Feliway Classic Calming Diffuser Refill, Zylkene 75 mg Capsules, Pet Naturals Calming Chews for Cats, Bach Rescue Remedy Pet, and VetriScience Composure Feline Bite-Sized Chews—cover the main delivery methods: environmental pheromones, oral amino-acid support, chewable multi-ingredient blends, homeopathic drops, and bite-sized veterinary supplements. For many households looking for a first-line, evidence-informed solution to situational stress, the Feliway Classic Calming Diffuser Refill is a strong starting choice for home-based environmental support; if you prefer an oral option, VetriScience Composure and Zylkene are commonly used complements. We hope you found what you were looking for — refine or expand your search using the site search to compare ingredients, check availability in your province, or find vet-recommended dosing and product testing information.

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