Calming Supplements for Pets: Do They Work?
From L-theanine to calming probiotics, learn about the supplements that may help your anxious pet.
Calming supplements have become increasingly popular for pets with mild to moderate anxiety. While they're not as powerful as prescription medications, many can provide meaningful support — especially for situational anxiety or as part of a broader treatment plan. Understanding what works (and what doesn't) helps you make informed choices.
Key Points
- Supplements work best for mild anxiety or as an add-on to other treatments
- Evidence varies widely between products
- L-theanine and alpha-casozepine have the most research support
- Calming probiotics are an exciting new area
- CBD products vary hugely in quality — choose carefully
- Always consult your vet before starting supplements
What the Research Shows
L-theanine (found in Anxitane): an amino acid from tea that promotes relaxation without sedation. Several studies show it reduces anxiety in dogs. Alpha-casozepine (Zylkene): a milk protein derivative with calming properties. Good evidence for noise anxiety and general anxiety. Calming probiotics (Purina Calming Care): specific strains that modulate the gut-brain axis. Emerging but promising research.
Pheromones
Adaptil (dog appeasing pheromone) mimics the pheromone mother dogs produce while nursing. Available as a diffuser, collar, or spray. Multiple studies show it reduces anxiety in various situations. Feliway (feline facial pheromone) mimics the pheromone cats use to mark territory as 'safe.' Available as a diffuser or spray. Both are safe with no side effects.
CBD Products
CBD (cannabidiol) from hemp is widely marketed for pet anxiety. While some studies show promise, the market is poorly regulated and product quality varies enormously. If you choose CBD, look for products with a Certificate of Analysis from a third-party lab, proper dosing information, and no THC (which is toxic to pets). Discuss with your vet first.
When Supplements Aren't Enough
Supplements are best for mild anxiety, situational stress, or as an addition to other treatments. If your pet has moderate to severe anxiety — destructive behavior, self-injury, panic attacks — supplements alone won't be sufficient. Don't delay effective treatment by relying solely on supplements. Your vet can help you determine the right level of intervention.
When to See a Vet Immediately
- You want guidance on which supplement to try
- Your pet is on other medications (possible interactions)
- Supplements aren't providing enough relief
- Anxiety is moderate to severe
- You want to try CBD but need guidance
- Your pet's anxiety is getting worse despite supplements
How RVC Can Help
RVC can recommend evidence-based calming supplements and help you create a comprehensive anxiety management plan. Call +853 6677 6611.
This article is for educational purposes only and does not replace professional veterinary advice. If your pet is showing any symptoms, please contact Royal Veterinary Center immediately at +853 6677 6611.