Calming chews are usually safe for healthy dogs when they are made specifically for dogs and given exactly according to the label. They are not automatically safe, however. The main risks are toxic ingredients such as xylitol, accidental overdosing, drug interactions, and using a supplement when a dog has severe anxiety or an underlying medical problem.
Reviewed:
A quick safety screen has 4 checks: the product is made for dogs, the ingredients are safe, the serving matches your dog's weight, and the product fits your dog's health needs.
Calming Chews for Dogs: Safety at a Glance
| Question | Practical answer |
|---|---|
| Are dog-specific calming chews generally safe? | Usually, when used at the labeled serving size. |
| Can calming chews cause side effects? | Yes. Possible effects include sleepiness, vomiting, diarrhea, poor coordination and excessive sedation. |
| Is xylitol dangerous? | Yes. Xylitol can cause life-threatening low blood sugar and liver injury in dogs. |
| Can dogs take human calming gummies? | No. Human products may contain xylitol, 5-HTP, THC or other ingredients that are unsafe for dogs. |
| Are calming chews effective for severe anxiety? | Usually not as the only treatment. Severe anxiety may require veterinary assessment, behavior modification and prescription medication. |
| Should a veterinarian approve them? | Yes, especially if your dog takes medication, is very young, pregnant, nursing, elderly or has liver or kidney disease. |
Which Ingredients Are Commonly Used in Calming Chews?
Dog calming chews may contain L-theanine, L-tryptophan, melatonin, valerian root, thiamine, alpha-casozepine, hemp ingredients or CBD. These ingredients have different safety profiles, and the amount can vary from one product to another.
L-theanine, L-tryptophan and Alpha-casozepine
L-theanine, L-tryptophan and alpha-casozepine appear in some veterinary calming supplements. They may help with mild stress or fear, but the evidence for supplements is more limited than the evidence for approved veterinary medications. VCA describes these products as possible options for mild stress, while noting that they are unlikely to be enough on their own for severe fear or anxiety.
Melatonin
Melatonin can cause sleepiness and other adverse effects in some dogs. Human melatonin products may contain xylitol, and sustained-release human melatonin should not be given to pets without veterinary direction.
Use extra caution with young dogs, pregnant or nursing dogs, dogs with severe liver disease and dogs taking certain medications.
Valerian Root
Valerian root is generally considered to have a wide safety margin, but too much can cause sedation, poor coordination, low body temperature and vomiting. Large exposures can sometimes cause agitation instead of calmness.
CBD and Hemp
The FDA has not approved cannabis or CBD products for use in animals and cannot assure their safety or effectiveness. CBD products may cause lethargy, vomiting, diarrhea, appetite changes or other adverse effects. Product quality can also vary.
Why Xylitol Makes Some Calming Chews Dangerous
Never give a dog a calming chew containing xylitol. Xylitol may also appear on the label as birch sugar, wood sugar or birch bark extract.
Xylitol can cause a rapid release of insulin in dogs, leading to a dangerous drop in blood sugar. Severe poisoning can cause weakness, staggering, collapse, seizures, liver failure and death. Symptoms can begin quickly, although serious effects may sometimes be delayed.
Check the full ingredient list, including inactive ingredients. Pay close attention to:
- Human melatonin gummies
- Sugar-free supplements
- Sleep aids
- Human calming products
- Gummies with unknown sweeteners
- Products labeled "sugar-free" or "low sugar"
If your dog has eaten a product containing xylitol, contact a veterinarian or emergency animal hospital immediately. Do not wait for symptoms to appear.
When Calming Chews May Be Reasonable
A dog-specific calming chew may be reasonable for a healthy dog with mild, occasional stress, such as:
- A short car trip
- A veterinary visit
- A temporary change at home
- Mild noise sensitivity
- A brief period of restlessness
Follow the label directions. Do not combine several calming products unless your veterinarian recommends it. Products may contain overlapping ingredients, which can increase the risk of excessive sedation or other adverse effects.
Store the container where your dog cannot reach it. Eating a large amount may cause vomiting, diarrhea, lethargy, poor coordination or excessive sedation. Depending on the ingredients, it may also cause dangerous electrolyte changes.
When Your Dog Should See a Veterinarian First
Speak with your veterinarian before using calming chews if your dog:
- Takes prescription medication or other supplements
- Has liver or kidney disease
- Is pregnant, nursing or used for breeding
- Is a puppy or has not reached sexual maturity
- Has a history of seizures
- Shows aggression, panic or self-injury
- Has severe separation anxiety
- Becomes unusually sedated after taking a chew
Supplements can interact with medications, and "natural" does not mean risk-free. VCA also notes that animal supplements are not reviewed in the same way as approved medications for safety and effectiveness before sale.
How to Choose a Safer Calming Chew
Before buying a product, check that it:
- Is labeled specifically for dogs.
- Lists every active and inactive ingredient.
- Provides a serving size based on your dog's weight.
- Does not contain xylitol, 5-HTP, THC or human sleep-aid ingredients.
- Identifies the manufacturer and provides a lot or batch number.
- Does not hide ingredient amounts in a vague proprietary blend.
- Includes clear storage and overdose instructions.
The FDA does not recognize "dietary supplement for animals" as a separate regulatory category. Products marketed for animals are generally regulated as animal food or animal drugs, depending on their ingredients and intended use. A calming chew should not be treated as equivalent to an FDA-approved veterinary medication.
Are Calming Chews Enough for Anxiety?
Calming chews may support an anxiety plan, but they are not a reliable standalone treatment for severe anxiety. Dogs with ongoing separation anxiety, noise phobia, fear aggression or panic may need a veterinary behavior assessment, structured training and, in some cases, prescription medication. For serious anxiety, supplements are generally an addition to treatment, not a replacement for it.
What to Do if Your Dog Eats Too Many Calming Chews
Call your veterinarian, an emergency veterinary clinic or an animal poison-control service if your dog has eaten more than the recommended amount.
Seek urgent help if your dog is:
- Unable to stand or walk
- Extremely sleepy or difficult to wake
- Vomiting repeatedly
- Trembling or having seizures
- Collapsing
- Showing weakness after possible xylitol exposure
Do not induce vomiting unless a veterinarian or animal poison-control professional specifically tells you to do so. Keep the packaging nearby and provide your dog's weight, the amount eaten and the time of ingestion.
Pet Poison Helpline is available in the United States at (855) 764-7661.
Bottom Line
Calming chews can be safe for dogs when the product is made for dogs, contains no xylitol, is correctly dosed and suits the individual dog. Use extra caution with melatonin, CBD, human gummies and products that contain several sedating ingredients. If anxiety is severe or persistent, consult a veterinarian instead of relying on calming chews alone.