# Is Slug and Snail Bait Poisonous to Dogs? Metaldehyde Risk Is slug bait poisonous to dogs? Yes, and it is one of the most dangerous products in your garden shed. Metaldehyde, the active ingredient in most slug and snail baits, can cause tremors and seizures within a few hours of ingestion, and it can be fatal without fast treatment. If you think your dog ate any amount of slug bait, treat it as an emergency right now. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Metaldehyde slug and snail bait is highly toxic to dogs and is the active ingredient in over 80% of these products worldwide [1]. - Signs usually start within 1 to 3 hours and include tremors, seizures, drooling, vomiting, and a high body temperature [2][1]. - There is no readily available antidote. Treatment means aggressive decontamination, seizure control, fluids, and hospitalization [3]. - Call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661 immediately. Do not wait for symptoms. - Do not induce vomiting unless a veterinarian tells you to. ## Is Slug Bait Poisonous to Dogs? Yes. Metaldehyde baits are significantly toxic to pets, and they come as granules, pellets, liquids, and powders [3]. Dogs are the animals most often poisoned, usually because bait was placed carelessly for pest control [1]. The bait often smells and tastes appealing, which is part of the problem. Pellets look like kibble or treats, and some formulations include molasses or bran to attract slugs, which attracts dogs too. ### Is snail bait harmful to dogs in the same way? Yes. Snail bait and slug bait are usually the same product with different marketing. Metaldehyde is the active component in the majority of slug and snail baits used around the world, and these products are common in wet, coastal areas where slugs thrive [1]. If a product kills snails and slugs, assume it can harm your dog until you read the label and confirm otherwise. ### Is slug killer harmful to dogs even after it rains? Yes, and this surprises many owners. Areas where metaldehyde bait was used should be considered contaminated for at least 2 weeks after application. Newer formulations resist moisture and breakdown, which means the risk to pets can last even beyond that 2 week window [3]. Rain does not make the yard safe. ### What about products labeled "pet safe" or "garden safe"? Some slug baits use iron phosphate instead of metaldehyde. These are generally considered much less toxic to dogs, though eating large amounts can still cause stomach upset. The word "safe" on a garden product label is not a guarantee for your pet. Read the active ingredient list every time, and if you are unsure what you have, call a poison control line with the product name and concentration. ### Other ingredients in the bait Some metaldehyde baits are mixed with other herbicides and pesticides, most commonly carbamate insecticides, to boost effectiveness [1]. That means your dog may be exposed to more than one poison at once, which can complicate treatment. Bring the product container or a photo of the label with you to the veterinary hospital. ## What Metaldehyde Does in the Body Metaldehyde is a cyclic polymer of acetaldehyde [1]. The target organ is the central nervous system [1]. In simple terms, it overexcites the brain and muscles. That overexcitation shows up as tremors, twitching, and seizures, and it drives body temperature dangerously high because of constant muscle activity. The poisoning also irritates the gut, so vomiting and diarrhea are common [1]. The combination of neurologic signs and gastrointestinal signs in a dog with access to a garden is a strong clue for metaldehyde. This is also why metaldehyde poisoning moves fast. In one review of 772 suspected cases in dogs, the average time from ingestion to the first sign was 2.9 hours, and just over half of the dogs showed effects within 1 hour [2]. Increased muscle activity such as twitching and convulsions lasted an average of 15.2 hours [2]. ## Signs of Metaldehyde Poisoning in Dogs Common signs include [3][1][2]: - Vomiting and diarrhea - Drooling (hypersalivation) - Panting and a high body temperature - Tremors, twitching, and muscle rigidity - Seizures or convulsions - Dilated pupils (though one fatal case reported pinpoint pupils) [4] - Uncoordinated walking (ataxia) - Sensitivity to touch or sound (hyperesthesia) - Lethargy or stupor ### How fast do signs appear? Fast. In the case review, 50.3% of dogs developed effects within 1 hour of ingestion, and the average was 2.9 hours [2]. A published fatal case involved an 11 month old German Spitz that arrived for emergency care with vomiting and seizures about 3 hours after eating a molluscicide containing 3% metaldehyde [4]. The dog was already in status epilepticus, meaning continuous seizure activity, on arrival [4]. ### Does the amount eaten matter? It matters, but you often will not know it. In the case review, the amount and strength of bait ingested was rarely known [2]. When it could be estimated, dogs had eaten an average of about 229.6 grams of bait [2]. The concentration in residential US products ranges from 2% to 4% metaldehyde [1]. Because you usually cannot know how much your dog ate, every suspected exposure needs a call to a veterinarian or poison control. ## What to Do Right Now Act immediately. Do not wait to see if your dog gets sick. 1. Move your dog away from the bait and pick up any remaining product. 2. Call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661. 3. Have the product container ready so you can read the active ingredient and concentration. 4. Tell them your dog's weight, the estimated amount eaten, and the time it happened. 5. Do not induce vomiting unless a veterinarian tells you to. Why the caution about vomiting? If your dog is already twitching or having seizures, inducing vomiting can lead to aspiration, where vomit enters the lungs. A veterinarian can decide whether decontamination is safe and how to do it. If your dog is actively seizing, keep him away from stairs and furniture, do not put your hands near his mouth, and get to a veterinary hospital immediately. Call ahead so the team can prepare. If you are also wondering about other things dogs pick up in the yard, our guide on [my dog ate a slug or snail and lungworm risk](/knowledge/veterinary-medicine/vet-visit-decisions/dog-ate-slug-snail-lungworm) covers a different but related concern. ## Veterinary Treatment for Metaldehyde Poisoning Treatment is aggressive and almost always requires hospitalization [3]. There is currently no readily available antidote for metaldehyde poisoning [3]. Instead, veterinarians focus on removing the poison and supporting the body while it clears. Typical steps include [3][1]: - Decontamination, which may include inducing vomiting, stomach lavage, and repeated doses of activated charcoal - Monitoring bloodwork, including acid-base status, since metabolic acidosis can develop - Intravenous fluid therapy - Controlling elevated body temperature with cooling measures - Muscle relaxants and anticonvulsants to control tremors and seizures - Supportive and neurologic care as needed In severe cases, some dogs receive hemodialysis. A study of 18 dogs with severe metaldehyde intoxication found that dialysis significantly decreased the need for anesthesia and the length of hospitalization, and aspiration pneumonia occurred less often in dialyzed dogs [5]. This is a specialized option available at some teaching hospitals, not a routine first step. The dose of any medication used is calculated by the veterinarian based on your dog's weight, current signs, and overall health. Never give human medications at home. ## Outlook After Metaldehyde Poisoning The prognosis is generally good if treatment is aggressive and timely [3]. Dogs that survive the first 24 hours of intoxication have a good prognosis, and spontaneous recurrent seizures are not expected afterward [1]. Recovery takes time. In the case review, recovery time was reported for 61 dogs and occurred on average at 39.3 hours [2]. Liver changes were uncommon, seen in only 4.6% of dogs, and kidney impairment was rare, affecting just one dog [2]. The flip side is that this poisoning can kill. A published case of an 11 month old dog that ingested a 3% metaldehyde product died despite treatment [4]. Delay is the biggest factor working against you. Every hour between ingestion and care matters. ## Prevention and Safer Alternatives Prevention is straightforward once you know the risk. - Read labels before you buy. Look for metaldehyde on the active ingredient list. If it is there, do not use it in a yard your dog accesses. - Consider iron phosphate baits instead. They are far less toxic to dogs, though large ingestions can still cause stomach upset. - Store all garden products in a locked cabinet or a sealed bin your dog cannot reach. - Apply bait only in areas dogs cannot access, and never in a bowl or pile that could be mistaken for food. - Remember the 2 week rule. Treated areas stay contaminated for at least 2 weeks, and moisture resistant formulations may pose a risk even longer [3]. - Watch your dog closely after any gardening project. Other common garden and household hazards deserve the same attention. Our articles on [plants poisonous to dogs](/knowledge/veterinary-medicine/toxicology-and-food-safety/plants-poisonous-to-dogs) and [can dogs eat garlic](/knowledge/veterinary-medicine/toxicology-food-safety/can-dogs-eat-garlic-allicin-toxicity-in-dogs) cover two more risks that catch owners off guard. ## Limitations and When to Contact a Veterinarian This article cannot tell you whether your specific dog will be fine. Individual cases need a veterinarian who can examine your dog, ask about timing and amount, and run tests if needed. Emergency now, meaning leave for the hospital immediately: - Any known or suspected ingestion of metaldehyde bait, even if your dog seems normal - Tremors, twitching, or muscle rigidity - Seizures or convulsions - Drooling with unsteady walking - A body temperature that feels very hot to the touch - Collapse, stupor, or trouble breathing Same day, call your veterinarian: - You found chewed bait packaging but are not sure your dog ate any - Your dog has mild vomiting or diarrhea after being in a treated yard - You are unsure whether your product contains metaldehyde Routine visit: - You want help choosing pet safe slug control for your garden - You want to review your yard for other toxins When in doubt, call. Poison control lines are staffed to help you decide, and a phone call costs far less than a missed poisoning. ## Frequently Asked Questions ### Can slug bait kill dogs? Yes. Metaldehyde poisoning can be fatal, and a published case describes a dog that died despite emergency treatment [4]. Survival depends heavily on how much was eaten and how fast treatment started. Dogs that make it through the first 24 hours have a good prognosis [1]. ### How long after eating slug bait will my dog show signs? Most dogs show signs within a few hours, and about half develop effects within the first hour [2]. Some dogs deteriorate very quickly, so waiting at home to see what happens is not a safe plan. Call for guidance as soon as you suspect ingestion. ### Is there an antidote for metaldehyde poisoning? No, there is no readily available antidote [3]. Treatment focuses on decontaminating the gut, controlling tremors and seizures, managing body temperature, and providing fluids and supportive care [3][1]. This is why early veterinary care matters so much. ### Will my dog be okay if he only ate a little? Possibly, but you cannot assume that. The amount and strength of bait ingested is rarely known in real cases, and clinical signs developed in 77.3% of dogs in one review [2]. Even a small amount in a small dog can cause serious signs. Let a veterinarian or poison control help you decide. ### Are there slug baits that are safe for dogs? Iron phosphate products are generally much less toxic to dogs than metaldehyde baits. No garden pesticide is truly risk free, so store everything out of reach and read the active ingredient list before buying. If you are unsure about a product you already own, call a poison control line with the label in hand. ## Related Articles - [My Dog Ate a Slug or Snail: Should I Worry About Lungworm?](/knowledge/veterinary-medicine/vet-visit-decisions/dog-ate-slug-snail-lungworm) - [Plants Poisonous To Dogs](/knowledge/veterinary-medicine/toxicology-and-food-safety/plants-poisonous-to-dogs) - [Are Tarantulas Poisonous to Dogs? Understanding the Risks](/knowledge/veterinary-medicine/pet-care/are-tarantulas-poisonous-to-dogs-understanding-the-risks) - [My Dog Ate a Mushroom: How to Tell If It's Toxic](/knowledge/veterinary-medicine/vet-visit-decisions/dog-ate-mushroom-toxic) - [Can Dogs Eat Garlic? Allicin Toxicity in Dogs](/knowledge/veterinary-medicine/toxicology-food-safety/can-dogs-eat-garlic-allicin-toxicity-in-dogs) - [Dog Ate a Candle: Wax, Wicks, and Fragrance Risks Explained](/knowledge/veterinary-medicine/emergency-and-first-aid/dog-ate-candle-risks) - [Is Corry's Snail Bait Toxic to Dogs? Slug Killer Risk](/knowledge/veterinary-medicine/toxicology-and-food-safety/corrys-snail-bait-toxic-dogs) - [Are Snail Pellets Toxic to Dogs?](/knowledge/veterinary-medicine/toxicology-and-food-safety/snail-pellets-toxic-dogs) - [Is Slug Killer Harmful to Cats? Bait and Slug Safety](/knowledge/veterinary-medicine/toxicology-and-food-safety/slug-killer-harmful-to-cats) ## References 1. [Metaldehyde Poisoning in Animals - Toxicology](https://www.merckvetmanual.com/toxicology/metaldehyde-poisoning/metaldehyde-poisoning-in-animals). Merck Veterinary Manual. 2. [Suspected metaldehyde slug bait poisoning in dogs: a retrospective analysis of cases reported to the Veterinary Poisons Information Service](https://pubmed.ncbi.nlm.nih.gov/22859414/). The Veterinary record, 2012. 3. [Dangers of Slug and Snail Bait for](https://www.petpoisonhelpline.com/uncategorized/dangers-of-slug-and-snail-bait-for-pets/). Pet Poison Helpline. 4. [Fatal metaldehyde poisoning in a dog confirmed by gas chromatography](https://pubmed.ncbi.nlm.nih.gov/32414366/). BMC veterinary research, 2020. 5. [Retrospective evaluation of the use of hemodialysis in dogs with suspected metaldehyde poisoning (2012-2017): 11 cases](https://pubmed.ncbi.nlm.nih.gov/32077221/). Journal of veterinary emergency and critical care (San Antonio, Tex. : 2001), 2020. ## Further Reading - [ASPCA Animal Poison Control Center](https://www.aspca.org/pet-care/animal-poison-control) - [ASPCA: People Foods to Avoid Feeding Your Pets](https://www.aspca.org/pet-care/aspca-poison-control/people-foods-avoid-feeding-your-pets) - [U.S. Food and Drug Administration: Potentially Dangerous Items for Your Pet](https://www.fda.gov/animal-veterinary/animal-health-literacy/potentially-dangerous-items-your-pet)