General Questions

Anxiety – What behaviours should I look for?

The symptoms and behaviours related to anxiety or fear are as numerous and varied as sizes and shapes of dogs and cats. Some of them are obvious: shaking during a storm, hiding during fireworks, destroying the house when left alone. Some are not-at-all obvious and often misunderstood. Did you know that yawning, lip-licking and even tail-wagging are common symptoms of anxiety and fear?

How do I return my product for the money-back guarantee?

Please read pack instructions carefully and follow directions for use. If you are not satisfied that the product has helped after using the ThunderShirt according to directions, we will provide a full refund through your veterinary practice or other place of purchase.

Behavioural and environmental modifications may be required. If in any doubt seek advice from your veterinary practice, behaviour therapy specialist or contact us.


  • Proof of purchase is required
  • Money Back Guarantee must be applied for within 30 days of purchase 
  • The ThunderShirt Guarantee only applies to Australian product


How does the ThunderShirt work?

Pressure has been used to successfully reduce anxiety for many years for both animals and humans. Examples include parents swaddling infants and people with autism using pressure to relieve persistent anxiety.

ThunderShirt patented design applies gentle, constant pressure on a dog’s torso, and this pressure has an amazing calming effect for most dogs. 

How do I clean a ThunderShirt?

ThunderShirt is made with durable, washable fabric. When necessary, a ThunderShirt may be washed in a regular cycle using regular laundry detergent and cold water. Hang to dry

Is overheating a concern when using a ThunderShirt?

Except in extreme conditions out in the sun, overheating is not typically a concern when using a ThunderShirt. Dogs cool themselves primarily through their mouth and paws and a ThunderShirt is constructed of a thin, breathable fabric.

What training is required for using a ThunderShirt?

For many types of anxiety or fear issues, no training is necessary. Just put a ThunderShirt onto your dog  and you will likely see results with the very first usage. However, for some, it may take two to three usages to see maximum results

Are there any special sizing and fit considerations for male dogs?

When fitting a ThunderShirt on a male dog, the straps that go around the stomach area should not cover or push on the genitals or prepuce. If the ThunderShirt rubs against the genitals or prepuce, irritation may result. If you see any indications of this, remove the ThunderShirt immediately. Try a smaller size or contact us for other suggestions.

What is the general size guide?
ThunderShirt should be worn with a comfortably snug fit, like a nice hug.

Please refer to the size guide below:

What if I see signs of discomfort or irritation with my dog when wearing a ThunderShirt?

When sized and put on properly, your dog should be very comfortable wearing a ThunderShirt. Problems are very rare, but if you see any signs of skin irritation or physical discomfort, please discontinue use and contact us.

How long can I leave a ThunderShirt on my dog?

Most people say that their dogs really enjoy wearing their ThunderShirts and they are safe to leave on for extended periods of time depending on the issue. Please note we recommend removing the ThunderShirt every one to two hours the first few times to be sure everything is fitting correctly and your pet is happy. Irritation or other issues are very rare, but it’s always best to be cautious. Remove the ThunderShirt at least twice a day if using for extended periods.


How many ThunderWunders should my dog consume?


Consume Daily

Under 15 kg

1 chew

15 – 30 kg

2 chews

Over 30 kg

3 chews

How many ThunderWunders calming chews should my cat consume?
Weight Consume daily
Under 3 kg 1 chews
3 – 5 kg 3 chews
Over 5 kg 6 chews
What should I do if my dog or cat consumes more than the recommended amount of ThunderWunders?

ThunderWunders are safe for pets, but each dog or cat is a unique individual. If your pet consumes more than the recommended amount of ThunderWunders, we advise you contact your veterinarian and keep a close eye on your pet.

Can I use ThunderWunders in conjunction with other behaviour medications?

ThunderWunders can be used in conjunction with ThunderShirt, ThunderEssence & Adaptil.

If your pet is on any other behaviour prescription medication make sure you check with your local veterinarian first. 


Is ThunderEssence safe for cats?

Some cats are sensitive or allergic to essential oils, so we do not recommend ThunderEssence for use with cats.

How long do they last?

The drops or spray should last for 4 to 8 hours.