Can Dogs Have Catnip? Safety, Dosage, and Effects Explained
Can dogs have catnip? Yes — but the effects differ from cats. Learn safe serving sizes by weight, preparation tips, benefits, and when to call the vet.
If you've ever watched your cat go wild over a sprig of catnip and wondered whether your dog could join in the fun, you're not alone. It's one of the most common questions I field from multi-pet households. Here's the short answer:
Catnip (Nepeta cataria) is non-toxic to dogs according to the ASPCA's non-toxic plant list. However, unlike cats who typically become hyperactive or euphoric, catnip tends to have a mild sedative effect on dogs. It won't make your dog "high" — but it can help with anxiety, motion sickness, and mild digestive upset when given in appropriate doses.
That said, "safe" doesn't mean "unlimited." The right dose depends on your dog's size, health status, and the form of catnip you're using. Below, we break down everything you need to know before sprinkling catnip into your dog's routine.
How Catnip Affects Dogs vs. Cats
The active compound in catnip is nepetalactone, an essential oil that stimulates specific receptors in cats' nasal tissue, triggering a euphoric behavioral response. Dogs have different olfactory receptor profiles, so nepetalactone doesn't produce the same excitatory reaction.
According to the Merck Veterinary Manual, catnip's effect on dogs is primarily gastrointestinal and mildly sedative. Most dogs who ingest catnip will experience:
- A calming or slightly drowsy effect within 30–60 minutes
- Mild gastrointestinal soothing (catnip has historically been used as a digestive aid in herbal veterinary practice)
- Occasional mild flatulence or loose stool if the dose is too large
Roughly 30–40% of dogs show no noticeable reaction at all. Unlike the "catnip response" in felines (which is hereditary and absent in about one-third of cats), the variability in dogs seems more individual than genetic — we simply don't have breed-level data on which dogs respond most strongly.
Safe Serving Sizes by Dog Weight
Catnip potency varies significantly between dried herb, fresh leaves, and essential oil forms. Never use catnip essential oil for dogs — the concentrated nepetalactone can cause respiratory irritation and gastrointestinal distress. Stick to dried or fresh plant material.
| Dog Weight Class | Weight Range | Dried Catnip | Fresh Catnip Leaves |
|---|---|---|---|
| Small breeds | Under 20 lb / 9 kg | ⅛ teaspoon (a generous pinch) | 1–2 small leaves |
| Medium breeds | 20–50 lb / 9–23 kg | ¼ teaspoon | 3–4 leaves |
| Large breeds | 50–90 lb / 23–41 kg | ½ teaspoon | 5–6 leaves |
| Giant breeds | Over 90 lb / 41 kg | ¾ teaspoon | 6–8 leaves |
Frequency: No more than once daily, and ideally not every day. Use catnip situationally — before car rides, vet visits, thunderstorms, or other anxiety-triggering events — rather than as a daily supplement. This prevents tolerance buildup and lets you monitor your dog's individual response clearly.
How to Prepare Catnip for Your Dog
Step 1 — Choose your form. Organic dried catnip leaf (the kind sold for cats or in bulk herb shops) is the easiest to dose precisely. Fresh catnip from the garden works too — just wash thoroughly to remove pesticides.
Step 2 — Crush or chop. Dried catnip can be sprinkled directly. For fresh leaves, chop them finely to reduce choking risk, especially for small breeds. Lightly crushing dried leaves between your fingers releases more nepetalactone and makes the dose more effective.
Step 3 — Mix into food or a treat. The simplest method is to sprinkle the measured dose over your dog's regular meal. You can also mix it into a spoonful of plain canned pumpkin (not pie filling), a smear of xylitol-free peanut butter, or stuff it into a Kong-style enrichment toy.
Step 4 — Avoid these preparation mistakes:
- No catnip tea or brewed preparations — hot water extraction concentrates nepetalactone unpredictably
- No seasoning blends — some culinary "catnip" mixes contain garlic or onion powder, both toxic to dogs
- No catnip sprays — these often contain alcohol or propylene glycol as carriers
- No catnip toys designed for cats — small toy parts are choking hazards, and some contain added silvervine or valerian that may interact unpredictably
Nutritional and Therapeutic Benefits
Catnip isn't a nutritional powerhouse the way blueberries or sweet potatoes are, but it does contain several beneficial compounds:
| Compound | Amount (per 1 tsp dried) | Potential Benefit for Dogs |
|---|---|---|
| Nepetalactone | ~10–30 mg (varies by cultivar) | Mild anxiolytic (anti-anxiety) effect; may reduce motion sickness |
| Rosmarinic acid | Trace amounts | Anti-inflammatory and antioxidant properties |
| Vitamin C | ~1–2 mg | Negligible at serving sizes; not a meaningful source |
| Dietary fiber | ~0.2 g | Minimal; may mildly support digestion |
| Thymol | Trace amounts | Mild antimicrobial properties (historically used in oral health) |
Where catnip genuinely shines for dogs is behavioral support, not nutrition. Veterinary behaviorists sometimes recommend catnip as a low-risk complementary approach for situational anxiety. A 2017 survey published in the Journal of the American Holistic Veterinary Medical Association found that catnip was among the top five herbs recommended by holistic practitioners for mild canine anxiety, though controlled clinical trials in dogs remain limited.
Practical use cases where catnip may help:
- Car rides: Give the appropriate dose 30–45 minutes before departure to reduce motion sickness and travel anxiety
- Vet visits: Administer before leaving home to take the edge off
- Noise phobias: Offer before expected fireworks or thunderstorms
- Separation anxiety: Use alongside counter-conditioning training protocols (not as a standalone treatment)
Potential Risks and Side Effects
While catnip is broadly safe, it's not risk-free. Here's what to watch for:
Common, mild side effects
- Loose stool or mild diarrhea: Usually occurs when the dose is too high. Reduce the amount by half next time.
- Flatulence: More common with fresh catnip due to higher fiber and volatile oil content.
- Lethargy beyond expected: Some dogs are more sensitive to the sedative effect. If your dog seems excessively sleepy or uncoordinated, the dose was likely too high.
Less common but more serious reactions
- Vomiting: Typically only with significant overdose (more than 3–4× the recommended dose). Usually self-limiting within 4–6 hours.
- Allergic reaction: Rare, but possible. Signs include facial swelling, hives, itching, or difficulty breathing. This constitutes an emergency — contact your vet immediately.
- Choking or intestinal blockage: Risk from whole fresh stems or from catnip stuffed into cat toys that a dog has torn open. Always supervise and use only the herb itself.
What happens if your dog eats too much catnip?
If your dog gets into a large quantity — say, knocks over a jar of dried catnip or raids a garden patch — expect vomiting, diarrhea, and pronounced lethargy. While not life-threatening in most cases, ingestion of more than 1 tablespoon per 20 lb of body weight warrants a call to your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 (24/7, consultation fee applies). Provide your dog's weight, estimated amount consumed, and time of ingestion.
Dogs Who Should NOT Have Catnip
Not every dog is a good candidate for catnip. Avoid it entirely in these situations:
- Puppies under 6 months: Their developing digestive and nervous systems are more sensitive to volatile oils. There's no safety data for this age group.
- Pregnant dogs: Catnip has mild uterine-stimulating properties in some species. Until more is known, avoid during gestation and whelping.
- Dogs on sedative medications: If your dog takes trazodone, gabapentin, acepromazine, or any other prescription sedative/anxiolytic, catnip could compound the sedative effect. Consult your veterinarian before combining.
- Dogs with seizure disorders: While catnip is not a known seizure trigger, any substance affecting neurological function should be cleared by your vet for epileptic dogs.
- Dogs with chronic GI conditions: IBD, pancreatitis, or other inflammatory GI diseases may be aggravated by the volatile oils. Get veterinary approval first.
- Senior dogs with liver or kidney disease: Reduced organ function can slow metabolization of plant compounds. Start with one-quarter of the standard dose if your vet approves.
Contact your veterinarian or an emergency clinic if your dog shows any of these after consuming catnip:
- Vomiting more than twice within 4 hours
- Diarrhea lasting more than 24 hours
- Facial swelling, hives, or difficulty breathing (possible anaphylaxis — go to emergency vet immediately)
- Extreme lethargy or inability to stand lasting more than 4 hours
- Seizures or tremors
- Known ingestion of more than 1 tablespoon per 20 lb of body weight
For after-hours guidance, call the ASPCA Animal Poison Control: (888) 426-4435 or the Pet Poison Helpline: (855) 764-7661.
How to Introduce Catnip Safely
Follow this protocol the first time you offer catnip to your dog:
- Start with half the recommended dose for your dog's weight class. If you have a 35 lb dog, begin with ⅛ teaspoon of dried catnip rather than the full ¼ teaspoon.
- Mix it into a small amount of familiar food — not a full meal. This way, if your dog vomits or refuses to eat, you haven't wasted dinner.
- Monitor for 24–48 hours. Watch for stool changes, behavioral shifts, appetite changes, or any signs of allergic reaction.
- If no adverse reactions occur, you can use the full recommended dose next time.
- Keep a brief log for the first few uses — note the dose, time given, and your dog's response. This helps you fine-tune the amount and timing for situations like car rides or thunderstorms.
Related Herbs: What's Safe and What's Not
Catnip belongs to the mint family (Lamiaceae), and dog owners often ask about related herbs. Here's a quick safety guide:
| Herb | Safe for Dogs? | Notes |
|---|---|---|
| Catnip (Nepeta cataria) | ✅ Yes | Mild sedative; follow dosing above |
| Silvervine (Actinidia polygama) | ✅ Yes | Often blended with catnip in cat products; safe for dogs in small amounts but less studied |
| Valerian root (Valeriana officinalis) | ⚠️ With vet guidance | Used for anxiety but can interact with medications; dose carefully |
| Peppermint (Mentha piperita) | ⚠️ Caution | Fresh leaves in tiny amounts are okay; concentrated oil is toxic and can cause liver damage |
| Pennyroyal (Mentha pulegium) | ❌ Toxic | Sometimes confused with catnip or mint — highly toxic, causes liver failure. Never feed to dogs. |
| Chamomile (Matricaria chamomilla) | ✅ Yes | Mild calming herb; often paired with catnip in calming supplements |
Critical warning: Pennyroyal is sometimes sold at garden centers or herb shops and can be mistaken for other mints. It is highly toxic to dogs (and cats, and humans in concentrated form). If you grow catnip at home, make sure you can positively identify it and keep your garden free of pennyroyal. The AKC's guide to poisonous plants is a helpful reference for identifying toxic look-alikes.
Frequently Asked Questions
Can dogs eat catnip every day?
Technically they can at the recommended doses, but it's not advisable. Daily use can lead to tolerance, meaning you'll need more to achieve the same calming effect. It's better to reserve catnip for specific situations — car rides, storms, vet visits — rather than making it a daily supplement. If you're looking for daily anxiety support, talk to your vet about options like L-theanine supplements, Adaptil pheromone products, or prescription medications.
Will catnip make my dog hyper like it does to cats?
Almost certainly not. The nepetalactone response that causes cats to roll, zoom, and act euphoric doesn't translate to dogs. Most dogs either show no reaction or become mildly relaxed and sleepy. If you're hoping for an enrichment activity that stimulates your dog, catnip isn't the right tool — try scent work games, snuffle mats, or frozen Kong toys instead.
Is catnip the same as cat grass?
No. Catnip is a specific herb (Nepeta cataria). "Cat grass" usually refers to young wheatgrass, oat grass, or barley grass shoots. Both are safe for dogs, but they serve different purposes — cat grass is mainly a fiber source that some dogs enjoy chewing, while catnip has mild sedative properties.
Can I give my dog catnip toys meant for cats?
I recommend against it, for two reasons. First, cat toys are typically small and can be choking hazards or cause intestinal blockage if your dog tears them apart and swallows the filling. Second, many catnip toys contain additional herbs like silvervine or valerian in unknown concentrations. It's safer to buy loose dried catnip and dose it yourself in your dog's food.
Does catnip help with dog aggression or reactivity?
No. Catnip's mild sedative effect is not sufficient to manage aggression, leash reactivity, or resource guarding. These behaviors require professional intervention with a certified behavior consultant (IAABC or CCPDT certified) using positive reinforcement and counter-conditioning protocols. Never attempt to sedate a reactive dog with herbs instead of addressing the underlying behavior with a qualified professional.
My dog ate a whole bag of catnip — is this an emergency?
If your dog consumed a large amount (more than 1 tablespoon per 20 lb of body weight), call your vet or the ASPCA Poison Control at (888) 426-4435. Expect vomiting, diarrhea, and lethargy. In most cases, this is uncomfortable but not life-threatening, and symptoms resolve within 12–24 hours. However, very small dogs who ingest large amounts may need supportive care like subcutaneous fluids to prevent dehydration.
Disclaimer: This article provides educational information and does not replace professional veterinary advice. Always consult your veterinarian before introducing new herbs or supplements to your dog's diet, especially if your dog has existing health conditions or takes prescription medications.
Anouk Beaumont
All our authors care for dogs every day — read more of their work on the authors page.
