ThunderShirt Instructions: A Comprehensive Guide
ThunderShirt offers a vet-recommended, drug-free solution for calming anxious dogs, utilizing gentle, constant pressure to provide a sense of security and comfort.
What is a ThunderShirt?
ThunderShirt is a revolutionary, vet-recommended product designed to provide a natural calming effect for dogs experiencing anxiety. It’s not a quick fix, but a tool to help manage various anxieties, including those triggered by thunderstorms, fireworks, or separation.
Unlike medications, ThunderShirt works by applying gentle, constant pressure – much like a comforting hug – which releases calming endorphins in your dog. It’s a simple, drug-free alternative or supplement to traditional anxiety treatments. The original calming solution, it’s been trusted by pet owners and professionals for years to help dogs feel safe and secure during stressful situations.
How ThunderShirts Work: The Science Behind the Calm
ThunderShirt’s effectiveness stems from the principle of gentle, constant pressure, similar to swaddling a baby. This pressure stimulates the release of calming endorphins, naturally reducing anxiety levels in dogs. It’s believed to activate the parasympathetic nervous system, responsible for rest and digestion, counteracting the “fight or flight” response triggered by stressful stimuli.
This technique, known as deep touch pressure, has been used for years in human therapy. ThunderShirt replicates this effect, providing a sense of security and comfort without the use of medication. It doesn’t stop the noise or event, but changes how your dog reacts to it.

Preparing Your Dog for ThunderShirt Use
Introduce the ThunderShirt gradually, associating it with positive experiences like treats or calm petting, ensuring a comfortable and stress-free acclimation.
Begin by simply letting your dog sniff and investigate the ThunderShirt while it’s lying flat on the floor. Don’t force interaction; allow curiosity to lead the way. Next, briefly drape the ThunderShirt over your dog’s back for just a few seconds, immediately rewarding with a high-value treat and verbal praise.
Gradually increase the duration your dog wears the ThunderShirt during calm moments, continuing to offer positive reinforcement. The goal is to create a positive association – the ThunderShirt equals good things! Avoid introducing it during stressful events initially; build comfort first. Following these steps allows you to learn exactly how to use ThunderShirt while the dog is calm.
Sizing and Fit: Ensuring Optimal Effectiveness
Proper fit is crucial for a ThunderShirt to work effectively. Measure your dog’s girth – the widest part of their chest – to determine the correct size. The ThunderShirt should fit snugly, like a gentle hug, without being too tight, restricting movement, or causing discomfort.
You should be able to easily slide two fingers between the ThunderShirt and your dog’s body. Refer to the official ThunderShirt sizing chart for accurate measurements. A poorly fitted shirt won’t apply the necessary pressure and may even increase anxiety. Ensuring optimal effectiveness requires a secure, yet comfortable, fit for your canine companion.

Step-by-Step ThunderShirt Application
Applying a ThunderShirt involves laying it over your dog’s back, fastening the neck straps loosely, wrapping the torso flap underneath, and securing it.
Applying the Classic ThunderShirt
To begin with the Classic ThunderShirt, carefully lay the garment over your dog’s back, ensuring the logo is positioned downwards. Gently fasten the neck straps, keeping them comfortably loose – you should be able to slide two fingers underneath. Next, wrap the long torso flap under your dog’s belly and securely attach it to the straps on the back.
It’s crucial to avoid over-tightening; the ThunderShirt should feel snug but not restrictive. Refer to the provided diagram to correctly identify all parts during application. Remember to introduce the ThunderShirt while your dog is calm for a positive experience, and watch helpful videos demonstrating the process for clarity.
Applying the Sport/Polo/Breeze ThunderShirt
These ThunderShirt styles differ from the Classic model; begin by laying the shirt over your dog’s head, then slide it onto their torso. Secure the straps, ensuring a snug, yet comfortable fit – two fingers should easily slide underneath. The Sport/Polo/Breeze designs often feature adjustable straps for a customized fit.
Pay close attention to the strap placement, referencing available videos for visual guidance. These models are designed for ease of use and a secure hold. Remember to introduce the shirt during calm moments and avoid over-tightening. Proper application is key to maximizing the calming benefits for your pet.
Adjusting for a Secure, Comfortable Fit
Achieving the correct fit is crucial for ThunderShirt effectiveness. You should be able to easily slide two fingers between the shirt and your dog’s body. Avoid over-tightening, as this can cause discomfort and defeat the purpose. Regularly check the fit, especially on growing puppies.

Adjust the straps as needed to maintain a snug, yet comfortable, embrace. Observe your dog’s body language for signs of discomfort. A properly fitted ThunderShirt shouldn’t restrict movement or breathing. Remember, the goal is gentle, constant pressure, not constriction. A secure fit ensures optimal calming benefits.

Using ThunderShirt for Different Anxiety Triggers
ThunderShirt effectively addresses anxieties stemming from thunderstorms, fireworks, travel, and separation—providing calming support during various stressful situations for your canine companion.
Thunderstorms and Loud Noises
ThunderShirts are particularly helpful during thunderstorms and when exposed to loud noises like construction or traffic. The gentle, constant pressure mimics a hug, offering a sense of security that can significantly reduce anxiety. Apply the ThunderShirt before the storm or noise begins for optimal effectiveness.
Consider pairing the ThunderShirt with a safe, comfortable space for your dog. Some dogs benefit from white noise or calming music alongside the ThunderShirt. Observe your dog’s reaction; if they seem more relaxed, continue using this combination during future events. Remember, consistency is key to building a positive association.
Fireworks and Parties
ThunderShirts can be incredibly beneficial during events with unpredictable loud noises, such as fireworks displays and parties. The consistent pressure helps to desensitize your dog to startling sounds, reducing fear and anxiety. Apply the ThunderShirt before guests arrive or fireworks begin for the best results.
Create a safe haven for your dog, away from the commotion. Combining the ThunderShirt with a familiar blanket and favorite toys can further enhance their sense of security. Monitor your dog closely for signs of distress, and offer gentle reassurance if needed. Early application is crucial for preemptive calming.
Travel Anxiety
ThunderShirts are exceptionally helpful for dogs experiencing travel anxiety, whether by car, plane, or other modes of transportation. The gentle, constant pressure mimics a comforting hug, reducing stress during potentially upsetting journeys. Apply the ThunderShirt before entering the vehicle or carrier, allowing your dog to acclimate while calm.
Pair the ThunderShirt with positive associations, like a favorite chew toy or a comfortable travel bed. Consider using ADAPTIL spray on the ThunderShirt for added calming benefits. Monitor your dog for signs of discomfort and adjust the fit as needed throughout the trip.
Separation Anxiety
ThunderShirts can be a valuable tool in managing separation anxiety in dogs, offering a sense of security when owners are away. Apply the ThunderShirt shortly before your departure, avoiding associating it solely with your leaving. Combine the ThunderShirt with desensitization and counter-conditioning exercises recommended by a veterinarian or certified trainer.
Ensure the ThunderShirt fits comfortably and doesn’t restrict movement. Consider leaving a familiar, comforting item with your dog while you’re gone. Monitor your dog’s behavior – if anxiety persists, consult with a professional for a comprehensive behavior modification plan.

Enhancing ThunderShirt Effectiveness
Combining a ThunderShirt with calming pheromones like ADAPTIL, and utilizing positive reinforcement, can significantly amplify its anxiety-reducing benefits for your canine companion.
Combining with Pheromones (ADAPTIL)
ADAPTIL, a synthetic copy of the dog appeasing pheromone, complements the ThunderShirt’s calming effect beautifully. Simply apply ADAPTIL Transport Spray onto the shirt, focusing on the head end to bring the scent closer to your dog’s face.
Ensure application approximately fifteen minutes before a known anxiety trigger, like a thunderstorm or car ride. This dual approach—gentle pressure from the ThunderShirt and the reassuring scent of ADAPTIL—creates a synergistic effect, potentially providing greater relief than either method alone.
Consider using ADAPTIL diffusers in your home environment for continuous support, especially for dogs with chronic anxiety.
Positive Reinforcement Techniques
Pairing ThunderShirt use with positive reinforcement can significantly enhance its effectiveness. When initially introducing the shirt, reward your dog with treats, praise, or a favorite toy while they are wearing it.
This creates a positive association, making them more receptive to the garment. Continue offering rewards during anxiety-provoking situations while the ThunderShirt is in place.
Following these simple instructions allows you to learn exactly how to use ThunderShirt while the dog is calm, building a strong positive connection and maximizing its calming benefits.

Troubleshooting Common Issues
ThunderShirt resistance, slipping, or discomfort can occur; ensure a secure, comfortable fit and supervise initial use, consulting a vet if problems persist.
Dog Resisting the ThunderShirt
If your dog resists the ThunderShirt, a gradual introduction is key. Begin by simply letting them sniff and investigate the garment, associating it with positive experiences like treats or praise.
Next, briefly drape the ThunderShirt over their back without fastening it, rewarding calm behavior. Slowly increase the duration, fastening the straps loosely at first.
Avoid forcing the ThunderShirt on, as this can increase anxiety. If resistance continues, ensure the fit isn’t too tight and consider using it during calmer moments initially, building positive associations before anxiety-inducing events. Remember positive reinforcement is crucial!
ThunderShirt Slipping or Coming Loose
If the ThunderShirt is slipping or coming loose, proper adjustment is essential. Ensure the neck straps are snug, but not constricting, allowing one to two fingers to fit comfortably underneath.
The long torso flap should wrap securely under the dog’s belly, and the Velcro closures should be firmly attached. Regularly check the Velcro for debris that might reduce its stickiness.
For dogs with particularly deep chests or slender builds, consider adjusting the side straps for a more customized fit. A properly fitted ThunderShirt remains secure without causing discomfort, providing consistent calming pressure.
Signs of Discomfort or Over-Tightening
Observe your dog closely for signs of discomfort while wearing the ThunderShirt. These include panting, excessive drooling, attempts to remove the shirt, or a hunched posture.
If the dog seems restricted in movement or displays any signs of pain, immediately loosen the straps. You should be able to easily slide two fingers between the shirt and your dog’s body.
Over-tightening can negate the calming effect and cause distress. Regularly check for skin irritation or redness under the ThunderShirt, especially during prolonged use.

Care and Maintenance of Your ThunderShirt
ThunderShirts are easily maintained with gentle washing; avoid harsh detergents or bleach to preserve the fabric’s effectiveness and your dog’s comfort.
Washing Instructions
To ensure the longevity and effectiveness of your ThunderShirt, follow these washing guidelines carefully. Machine wash in cold water on a gentle cycle is recommended. Use a mild, pet-friendly detergent, avoiding any harsh chemicals, bleach, or fabric softeners, as these can irritate your dog’s skin or diminish the shirt’s calming properties.
After washing, lay the ThunderShirt flat to dry or tumble dry on a low heat setting. Avoid high heat, as it may cause shrinkage or damage the fabric. Do not iron the ThunderShirt. Proper cleaning maintains hygiene and ensures your dog continues to benefit from its calming embrace. Regular washing keeps the shirt fresh and comfortable for your furry friend.
Storage Guidelines
Proper storage of your ThunderShirt when not in use is crucial for maintaining its shape and functionality. Store the shirt in a cool, dry place, away from direct sunlight and extreme temperatures. Avoid storing it in damp environments, which could lead to mildew or unpleasant odors.
To prevent creasing and maintain its effectiveness, loosely fold the ThunderShirt or hang it on a padded hanger. Avoid storing it with items that could snag or damage the fabric. Keeping it clean and stored correctly ensures it’s readily available and in optimal condition whenever your dog needs a calming hug.

ThunderShirt Variations and Models
ThunderShirt comes in Classic, Sport, and Polo/Breeze models, each designed with varying materials and features to suit different dog breeds and preferences.
Classic ThunderShirt
The Classic ThunderShirt is the original design, known for its effectiveness and simplicity. It features a vest-style wrap that applies gentle, constant pressure around your dog’s torso, mimicking the feeling of being swaddled or hugged. This pressure is key to calming anxiety, as it releases endorphins and has a soothing effect.
This model utilizes adjustable straps to ensure a secure yet comfortable fit for a wide range of dog sizes. It’s ideal for dogs experiencing anxiety due to thunderstorms, fireworks, or general stress. Many owners find the Classic style easy to apply and maintain, making it a popular choice for long-term anxiety management.
Sport ThunderShirt
The Sport ThunderShirt offers a lighter, more breathable option compared to the Classic model, making it suitable for warmer climates or dogs that overheat easily; It maintains the same calming principle of gentle, constant pressure but utilizes a more streamlined design. This version features a unique, patented design that allows for a wider range of motion, ensuring your dog remains comfortable during activity.
The Sport style is particularly beneficial for active dogs experiencing anxiety during travel or outdoor events. It’s easy to put on and adjust, providing a secure fit without restricting movement. Owners appreciate its lightweight feel and effectiveness in reducing anxiety symptoms.
Polo & Breeze ThunderShirt
The Polo & Breeze ThunderShirt combines style and functionality, offering a fashionable and effective anxiety solution for your canine companion. These models feature a breathable mesh design, ideal for dogs prone to overheating or those living in warmer environments. They provide the same gentle, constant pressure as other ThunderShirt variations, promoting a calming effect.
The Polo style offers a classic look, while the Breeze provides maximum ventilation. Both are easy to apply and adjust, ensuring a comfortable and secure fit. These shirts are perfect for everyday use or during specific anxiety-inducing events, offering a discreet and effective calming aid.

Safety Precautions and Considerations
Supervise your dog during initial ThunderShirt use, ensuring a comfortable fit and monitoring for any signs of distress or discomfort.
Supervision During Initial Use
Initial supervision is crucial when introducing your dog to the ThunderShirt. Closely observe your pet for any signs of discomfort, such as excessive panting, lip licking, or attempts to remove the shirt. Allow your dog to acclimate gradually, starting with short periods of wear and gradually increasing the duration.
Ensure the ThunderShirt isn’t too tight, restricting movement or breathing. A properly fitted shirt should allow your dog to move freely while still applying gentle, constant pressure. Positive reinforcement, like treats and praise, can help create a positive association with the ThunderShirt, making the experience more pleasant for your furry friend.
When to Consult a Veterinarian
Consult your veterinarian if your dog’s anxiety is severe or if the ThunderShirt doesn’t provide sufficient relief. A vet can help rule out underlying medical conditions contributing to the anxiety and discuss additional treatment options, such as behavioral therapy or medication.
If your dog exhibits signs of distress while wearing the ThunderShirt – including excessive drooling, shaking, or attempts to escape – remove the shirt immediately and seek veterinary advice. The ThunderShirt is a tool to aid in managing anxiety, not a replacement for professional veterinary care. Early intervention is key to improving your dog’s quality of life.