# Is Roundup Toxic to Cats? Herbicide Safety Facts Is Roundup toxic to cats? Yes, Roundup and other glyphosate-based herbicides can be harmful to cats, especially if they lick the product, walk through wet spray, or groom themselves afterward. The risk depends on the form of the product, how fresh the application is, and how much your cat takes in. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Roundup is a glyphosate-based herbicide, a class of chemicals shown to cause toxic effects in non-target animals [1]. - The greatest danger to cats is the wet product itself, not a dry lawn. Most exposures happen when a cat walks through freshly sprayed plants and then grooms its paws and fur. - Roundup formulations can be more toxic than glyphosate alone at the same glyphosate-equivalent concentration [2]. - There is no safe home antidote. If you suspect exposure, call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661 right away. - Never induce vomiting unless a veterinarian tells you to. ## Is Roundup Toxic to Cats? Yes. Roundup is a glyphosate-based herbicide (GBH), and this group of chemicals is widely used in agriculture and can cause toxic effects in animals that are not the intended target [1]. Cats are not the target of these products, but they live in the same yards, gardens, and garages where the products are stored and sprayed. That does not mean every brush against a treated weed is an emergency. It means the product deserves respect and careful handling around pets. ### Which Products and Which Parts Matter The word "Roundup" covers many different formulations. Some are ready-to-use sprays, some are concentrates that must be diluted, and some combine glyphosate with other active ingredients. The label on your specific bottle is the best guide to what is inside. The part of the product that matters most is the liquid concentrate. It is stronger than a diluted spray and far more dangerous if a cat walks through a spill or licks it off its coat. Granular or dried residue is generally a smaller concern, but it is not zero. ### Is Roundup Safe to Use Around Cats? No herbicide is truly "safe" to use around cats in the sense that you can ignore it. You can reduce the risk a great deal by keeping cats away from the area while you spray and until the product has fully dried. The label directions exist for a reason. Follow them, keep your cat indoors during application, and store the bottle where a cat cannot knock it over or chew it. ## What Is the Toxic Principle in Roundup? The active ingredient is glyphosate. In the body, glyphosate-based herbicides can interfere with normal cell function and reproduction. In a laboratory model using pig oocytes, exposure to Roundup impaired the developmental competence of the egg cells, and Roundup was more toxic than pure glyphosate at the same glyphosate-equivalent concentrations [2]. That study looked at cells in a dish, not at a cat that walked across a lawn. Still, it tells us something useful. The "inactive" ingredients in a formulation can add to the harm, so you cannot judge risk by the glyphosate percentage alone [2]. For a cat, the practical concern is the same as with many household chemicals. A small lick of a diluted, dried residue is usually minor. A mouthful of concentrate, or repeated grooming of a coat soaked in spray, is a serious exposure. ## Signs of Roundup Poisoning in Cats Signs depend on how much product your cat took in and by which route. Common things owners notice include: - Drooling, lip smacking, or pawing at the mouth after licking the product - Vomiting or diarrhea - Lack of appetite - Lethargy or weakness - Unsteady walking - Tremors or twitching in severe cases - Irritated skin, redness, or hair loss where the product touched the coat Some cats show almost nothing at first. Others become sick within hours. If you saw your cat contact the product, do not wait for signs to appear before calling for advice. ### How Long Is Roundup Toxic to Cats? This is one of the most common questions, and the honest answer is that it depends on the product and the weather. A liquid spray is most hazardous while it is still wet. Once it has dried on the leaf surface, the risk of a casual brush against the plant drops sharply. Drying time varies with temperature, humidity, sunlight, and how heavily the area was sprayed. As a practical rule, keep your cat away from a treated area until the spray has completely dried, and longer if the label says so. If you are unsure, keep your cat inside and call the manufacturer's label number or your veterinarian. Do not rely on a fixed number of hours for every product. Read the label on the bottle you actually used. ## What to Do Right Now If Your Cat Was Exposed Act quickly, but stay calm. The steps below apply whether you saw the exposure happen or you suspect it. 1. Move your cat away from the treated area. 2. If the product is on the coat, wipe it off with a damp cloth or give a gentle bath with mild pet shampoo, if your cat tolerates it. Wear gloves. 3. Do not let your cat groom itself before you clean the product off. 4. Call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661. 5. Have the product label or bottle with you so you can read the ingredient list and concentration. 6. Do not induce vomiting unless a veterinarian tells you to. If your cat is having a seizure, is struggling to breathe, or is collapsed, go to the nearest emergency veterinary hospital now. Call ahead so the team can prepare. ## How Veterinarians Treat Roundup Exposure in Cats Treatment is supportive and depends on the route of exposure. Your veterinarian will calculate any medication dose from your cat's weight and current health, so no home dosing is appropriate. For skin exposure, the focus is removing the product with bathing and preventing the cat from grooming it off. For oral exposure, a veterinarian may give activated charcoal or other treatments to limit absorption, but only after assessing the case. Never give charcoal at home. If your cat is vomiting or dehydrated, intravenous fluids and anti-nausea medication may be needed. Tremors or seizures are treated with appropriate medications in the hospital. Blood work may be checked to look at liver and kidney values and to rule out other causes. ### Outlook After Exposure Many cats that contact a small amount of a diluted, dried herbicide do well with prompt cleaning and monitoring. Cats that take in concentrate or a large volume of spray can become seriously ill and may need hospitalization. The earlier treatment starts, the better the outlook tends to be. This is why a phone call to a poison control line or your veterinarian is worth making even when you are not sure your cat was actually exposed. ## Prevention and Safer Alternatives The simplest protection is separation. Keep your cat indoors while you apply any herbicide, and keep it indoors until the product has dried completely. Store all garden chemicals in a closed cabinet or high shelf that a cat cannot reach. Wash your hands after handling the product, and change your clothes before you pet your cat. Do not let your cat walk through a spill, and clean up any spill with paper towels you throw away immediately. If you want to reduce chemical use in your yard, consider these options: - Pull weeds by hand, especially when the ground is soft after rain. - Use mulch or landscape fabric to smother weeds. - Mow or trim before weeds go to seed. - Plant ground cover that outcompetes weeds. If you do use an herbicide, choose the least toxic product that will do the job, apply it on a calm day, and spot-treat instead of spraying the whole yard. ### Other Household Hazards Worth Knowing Herbicides are only one risk in a cat's world. Many common garden and house plants are far more dangerous. If you are pet-proofing your home, review which plants are toxic to cats and which flowers to avoid. Lilies, for example, are a well-known and severe hazard, and you can read more in our guide to lilies and cats. You can also browse the full list of plants toxic to cats and flowers that are toxic to cats, plus house plants toxic to cat owners should know about. ## Limitations and When to Contact a Veterinarian No article can tell you how your individual cat will respond to an exposure. The product, the amount, the route, and your cat's underlying health all matter. Your veterinarian needs to see the case to give you real advice. Contact a veterinarian the same day if your cat walked through a wet spray, licked a small amount of product, or has mild drooling or vomiting. A routine visit is reasonable if signs are mild and you want your cat checked. Go to an emergency hospital now if your cat is having seizures, is struggling to breathe, is collapsed or unresponsive, or is vomiting repeatedly and cannot keep water down. Do not wait to see if things improve on their own. ## Frequently Asked Questions ### Can my cat get sick from walking on a lawn that was sprayed last week? Usually not, if the product has fully dried and your cat only walked across the surface. The main risk is a cat that walks through wet spray and then grooms its paws and coat. If the grass is dry and there was no spill, the chance of a meaningful exposure is low. ### Is Roundup more dangerous than plain glyphosate? Formulations can be more toxic than glyphosate alone at the same glyphosate-equivalent concentration. That finding comes from a laboratory study on pig egg cells, so it does not translate directly to a cat in a yard. It does mean you should treat the whole product, not just the active ingredient, as the hazard. ### What if my cat only licked a tiny bit off its paw? Call a poison control line or your veterinarian and describe exactly what happened. A tiny lick of a diluted, dried residue is often minor, but a lick of concentrate is not. Do not induce vomiting unless a veterinarian tells you to. ### How do I clean a cat that walked through herbicide? Put on gloves and wipe the product off with a damp cloth, or bathe your cat with mild pet shampoo if it will tolerate that. Keep your cat from grooming until the coat is clean. Then call for advice about whether further care is needed. ### Are there herbicides that are safe around cats? No herbicide is risk-free around pets, but you can lower the risk by choosing the least toxic option, spot-treating instead of broadcast spraying, and keeping your cat away until the product dries. Hand pulling and mulch avoid the question entirely. If you must spray, follow the label and keep your cat indoors during and after application. ## Related Articles - [Are Lilies Toxic to Cats?](/knowledge/veterinary-medicine/toxicology-and-food-safety/are-lilies-toxic-to-cats) - [Plants Toxic To Cats](/knowledge/veterinary-medicine/toxicology-and-food-safety/plants-toxic-to-cats) - [Flowers That Are Toxic To Cats](/knowledge/veterinary-medicine/toxicology-and-food-safety/flowers-that-are-toxic-to-cats) - [Flowers Toxic To Cats](/knowledge/veterinary-medicine/toxicology-and-food-safety/flowers-toxic-to-cats) - [House Plants Toxic To Cat](/knowledge/veterinary-medicine/toxicology-and-food-safety/house-plants-toxic-to-cat) - [House Plants Toxic To Cats Pictures](/knowledge/veterinary-medicine/toxicology-and-food-safety/house-plants-toxic-to-cats-pictures) - [Is Weed Killer Harmful to Cats? Roundup and Lawn Safety](/knowledge/veterinary-medicine/toxicology-and-food-safety/weed-killer-harmful-cats) - [Is Roundup Harmful to Cats and Dogs? Glyphosate Safety](/knowledge/veterinary-medicine/toxicology-and-food-safety/roundup-harmful-to-cats-dogs) - [Is Glyphosate Toxic to Cats? Herbicide Safety Guide](/knowledge/veterinary-medicine/toxicology-and-food-safety/glyphosate-toxic-cats) ## References 1. [Evaluation of reference genes for reverse transcription-quantitative PCR assays in organs of zebrafish exposed to glyphosate-based herbicide, Roundup](https://pubmed.ncbi.nlm.nih.gov/29173213/). Animal : an international journal of animal bioscience, 2018. 2. [Glyphosate and its formulation Roundup impair pig oocyte maturation](https://pubmed.ncbi.nlm.nih.gov/32686734/). Scientific reports, 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) - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners)