Updated for 2026 — This article has been reviewed and updated with the latest recommendations.
Anxiety in dogs shows up in a lot of ways. Some dogs pace and pant during thunderstorms. Others destroy furniture when left alone. Some bark nonstop at nothing in particular, and a few shut down completely and refuse to eat or engage. If your dog is dealing with anxiety, you have probably tried everything from extra exercise to leaving the TV on, with mixed results.
Calming products are not a cure for anxiety, but the right one can take the edge off enough that your dog can function more normally while you work on the underlying cause.
Here are the products that have the most evidence and the best track record.
01Understanding Dog Anxiety
Before reaching for a product, it helps to identify what type of anxiety your dog is dealing with. Separation anxiety triggers when the dog is left alone and can range from mild whining to full-scale destruction. Noise anxiety is a response to specific sounds like thunderstorms, fireworks, or construction.
Generalized anxiety is a persistent state of unease that does not have an obvious trigger.
The distinction matters because different products work better for different types of anxiety. A calming supplement that takes 30 minutes to kick in is useless if your dog's anxiety spikes suddenly during a thunderstorm. A pressure wrap that helps with noise anxiety might do nothing for a dog with separation anxiety who panics the moment you leave.
02ThunderShirt Classic
The ThunderShirt applies gentle, constant pressure to your dog's torso, similar to swaddling an infant.
The theory is that this pressure has a calming effect on the nervous system, and for many dogs, it genuinely works. Studies and owner reports suggest that around 80 percent of dogs show improvement when wearing the ThunderShirt, particularly for noise anxiety and situational stress.
The shirt is easy to put on with Velcro closures and comes in sizes from extra small to extra large. It works best when introduced before the anxiety trigger occurs, so put it on your dog before the storm starts or before you leave the house, not after they are already in full panic mode.
Some dogs respond the first time they wear it. Others need a few uses to show improvement.
03Adaptil Calming Diffuser
Adaptil products use a synthetic version of the pheromone that nursing mother dogs produce to calm their puppies. The diffuser plugs into an outlet and releases this pheromone continuously, creating a calming environment throughout the room. Refills last about 30 days, and the diffuser covers roughly 700 square feet.
This is a passive, hands-off approach that works well for dogs with generalized anxiety or mild separation anxiety.
You do not need to do anything to your dog. Just plug in the diffuser in the room where they spend the most time. It will not sedate your dog or make them drowsy. It simply reduces the baseline stress level so they are less reactive to triggers. Adaptil also makes a collar version that travels with your dog, which is useful for vet visits, car rides, or boarding.
04VetriScience Composure Chews
VetriScience Composure is a supplement chew that uses a blend of colostrum, L-theanine, and thiamine to promote calm behavior.
L-theanine is an amino acid found in green tea that supports relaxation without drowsiness, and colostrum contains bioactive proteins that may help modulate stress responses.
These chews work best when given 30 to 60 minutes before a known stressor, though they can also be used daily for dogs with ongoing anxiety. The flavor is palatable enough that most dogs eat them willingly, and they do not require a prescription.
They are not as potent as prescription anti-anxiety medications, but for mild to moderate anxiety, they provide noticeable relief for many dogs.
05PetHonesty Calming Hemp Chews
PetHonesty's calming chews combine hemp seed powder, chamomile, valerian root, and organic hemp oil to promote relaxation. Hemp-based calming products have gained popularity in recent years, and while the research is still catching up, many dog owners report positive results, particularly for dogs with mild anxiety and restlessness.
These chews are designed for daily use and work cumulatively, meaning they tend to be more effective after consistent use over one to two weeks rather than as an on-the-spot remedy. They are a good fit for dogs with low-level daily anxiety, nervous energy, or difficulty settling down in the evening. As with any supplement, check with your vet before starting, especially if your dog is on other medications.
06Purina Pro Plan Calming Care Probiotic
This one is different from typical calming products because it works through the gut-brain axis.
Purina's Calming Care contains a specific probiotic strain, Bifidobacterium longum, that has been shown in clinical studies to reduce anxious behaviors in dogs. The probiotic is delivered as a powder that you sprinkle on your dog's food daily.
The effects are not immediate. Most dogs need six to eight weeks of daily use before the full calming effect becomes apparent. But for dogs with chronic anxiety, the results can be significant.
This product works well as a long-term foundation that you combine with other short-term solutions like a ThunderShirt for acute episodes. It does not cause drowsiness and has no known interactions with medications.
07When to Talk to Your Vet
Over-the-counter calming products work well for mild to moderate anxiety, but severe anxiety often requires professional intervention.
If your dog is injuring themselves, destroying property, refusing to eat, or showing aggression related to their anxiety, talk to your veterinarian about prescription options. Medications like trazodone, fluoxetine, or gabapentin can be used alongside behavioral modification to manage severe cases effectively.
Calming products are most effective when combined with environmental management, training, and exercise.
A ThunderShirt paired with a consistent departure routine can help separation anxiety. A calming supplement combined with desensitization exercises can reduce noise phobia over time. No single product solves anxiety on its own, but the right combination can make a meaningful difference in your dog's quality of life.