# Is Roundup Harmful to Cats and Dogs? Glyphosate Safety Is Roundup harmful to cats and dogs? The honest answer is that the risk depends on how much glyphosate your pet actually contacts and swallows. Small exposures to a dried, treated lawn are unlikely to cause serious poisoning, but drinking from a spray container, chewing a sprayed plant, or walking through wet herbicide and then grooming can lead to real exposure. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Glyphosate is the active ingredient in Roundup, and pets in the United States are commonly exposed to it. A study of dogs and cats in New York State found glyphosate in the urine of both species, with cats averaging about twice the urinary concentration of dogs [1]. - The highest risk comes from concentrated liquid product, not from a lawn that has fully dried. Freshly sprayed grass, puddles of mixed spray, and open containers are the main hazards. - Signs of significant exposure include vomiting, drooling, lethargy, wobbliness, and loss of appetite. These usually appear within a few hours of a meaningful exposure. - If you suspect your pet swallowed herbicide, call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661 right away. Do not induce vomiting unless a veterinarian tells you to. - Most pets that only walk on a dried, treated lawn do well with a bath and monitoring. Keep pets off treated areas until the product is completely dry and follow the label's reentry time. ## Is Roundup Safe for Cats and Dogs Around the Home? Roundup products are herbicides built around glyphosate, and they are among the most widely used weed killers in the United States [1]. That widespread use means most pets live near treated pavement, lawns, and gardens at some point. The realistic question is not whether glyphosate exists in the environment. It does. The question is whether your pet is likely to absorb enough to get sick. For most household situations, the answer is no, provided you keep pets away during application and until the surface dries. The danger rises sharply when pets have access to the concentrated product itself, to wet spray, or to containers and sprayers left within reach. One detail worth knowing: pets carry a measurable body burden of glyphosate from everyday life, not from a single dramatic incident. In paired urine and feces samples, cats had higher glyphosate and AMPA (its breakdown product) concentrations than dogs, and both were higher than in the humans tested [2]. Researchers also found that glyphosate and AMPA are excreted mainly in feces, at rates several times higher than in urine [2]. That tells us exposure is common and ongoing, and it does not by itself prove harm. ## Which Roundup Products and Plant Parts Are Most Dangerous ### The concentrated liquid The undiluted concentrate is the most hazardous form. It often contains surfactants and other ingredients that can irritate the mouth, throat, and stomach. A pet that bites a bottle, laps a spill, or drinks from a mixing bucket gets a much larger dose than a pet that trots across a dry lawn. ### Wet spray and freshly treated surfaces Wet herbicide transfers easily to paws, fur, and the tongue. A cat grooming its paws after walking through wet spray swallows whatever it picked up. This is the most common route of meaningful exposure for indoor-outdoor pets. ### Treated plants and grass Pets that graze on grass or chew ornamental plants can swallow residue on the leaves. The amount on a single blade is small, but a pet that eats a lot of treated vegetation over time adds to its total exposure. ### Containers, sprayers, and puddles Leftover product in a sprayer nozzle, a tipped-over bottle, or a puddle of diluted mix is a concentrated source. Store these out of reach and rinse or dispose of them properly. ## What Glyphosate Does in the Body Glyphosate works by blocking a plant enzyme pathway that animals do not have. That is the main reason pure glyphosate has relatively low acute toxicity in mammals compared with many older pesticides. The picture changes with formulated products. In laboratory work on pig oocytes, Roundup was more toxic than pure glyphosate at the same glyphosate-equivalent concentration, altering steroid production and increasing oxidative stress markers [3]. This suggests the added ingredients in the formulation, not glyphosate alone, drive some of the biological effects. Other research points to oxidative stress as a mechanism. In a fish species exposed to a glyphosate-based formulation, genes tied to the antioxidant system changed expression even at a low concentration allowed under that country's rules [4]. Whether the same changes happen in dogs and cats at typical household exposures is not well established in veterinary research. Glyphosate also affects some parasites. It inhibited Toxoplasma gondii, the parasite behind toxoplasmosis, in laboratory and mouse studies [5]. That is interesting scientifically, but it does not mean glyphosate is a treatment for pets, and it does not tell us much about toxicity in dogs and cats. ## Signs of Glyphosate Exposure in Dogs and Cats ### Mild exposure - Drooling or lip smacking - Mild vomiting - Pawing at the mouth - Mild stomach upset or soft stool ### Moderate to severe exposure - Repeated vomiting - Lethargy or weakness - Wobbliness or unsteady walking - Tremors - Loss of appetite - Diarrhea - Eye or skin irritation if product splashed there ### Timeline Signs usually show up within a few hours of swallowing a meaningful amount. Skin and eye irritation can appear within minutes of contact. If your pet walked through wet spray and groomed itself, signs may take a bit longer to appear because grooming happens after the walk. If your pet has any of the moderate or severe signs, treat it as urgent. ## What to Do Right Now 1. Move your pet away from the treated area or product immediately. 2. If product is on the skin or paws, wash with mild soap and lukewarm water. Rinse well. 3. If product splashed in the eyes, flush with plain water for several minutes. 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 ready. The exact ingredients and concentration matter for the assessment. 6. Do not induce vomiting unless a veterinarian tells you to. Some herbicide formulations can cause more harm coming back up, and vomiting is not always the right move. If your pet is having a seizure, is struggling to breathe, or is collapsed, go to the nearest emergency veterinary hospital now and call ahead so they can prepare. ## How Veterinarians Treat Glyphosate Exposure Treatment depends on the route and the amount. For skin contact, the veterinarian will wash the pet thoroughly and check for irritation or burns. For eye contact, they will flush the eye and examine it for damage. For swallowing, care is usually supportive. That can include: - Activated charcoal, if the veterinarian decides it is appropriate and the timing is right - Fluids under the skin or into a vein to support hydration and blood pressure - Medication to control vomiting - Medication to control tremors or seizures, if present - Blood work to check organ function and electrolytes There is no specific antidote for glyphosate. The veterinarian calculates any medication dose from your pet's weight and health, and treatment is tailored to what your pet is doing clinically. ## Outlook After Exposure Most pets with mild exposure recover fully with supportive care and a bath. Pets that swallow concentrated product can have more serious stomach, neurologic, or breathing problems, and those cases need hospital care. The outlook is best when the exposure is identified early and the pet is seen quickly. If you are unsure how much your pet swallowed, err on the side of calling poison control or your veterinarian. A phone call is cheap compared with a delayed emergency. ## How to Keep Pets Safe Around Treated Areas ### Before you spray - Read the label and follow the reentry time. That is the interval before people and pets should return. - Remove water bowls, toys, and food dishes from the area. - Close windows if you are spraying near the house. - Keep pets indoors during application. ### After you spray - Let the surface dry completely before letting pets back out. Drying time varies by product and weather. - Walk dogs on a leash away from treated zones for the first day. - Wipe or rinse paws after walks near treated areas. - Store all herbicide containers, sprayers, and mixing buckets in a locked cabinet or high shelf. ### Safer alternatives - Pull weeds by hand, especially in small beds. - Use mulch, cardboard, or landscape fabric to smother weeds. - Pour boiling water on weeds in cracks and pavement. - Mow or trim before weeds set seed. - Choose pet-safe groundcovers and plants. If you are picking plants for a yard or home with pets, see [Plants That Aren't Toxic To Cats And Dogs](/knowledge/veterinary-medicine/toxicology-and-food-safety/plants-that-aren-t-toxic-to-cats-and-dogs) and [Non Toxic To Cats Houseplants](/knowledge/veterinary-medicine/toxicology-and-food-safety/non-toxic-to-cats-houseplants). If you are worried about other household hazards, [Common Houseplants Toxic to Cats and Dogs](/knowledge/veterinary-medicine/toxicology-and-food-safety/common-houseplants-toxic-to-cats-and-dogs) covers plants that cause vomiting, drooling, and worse. ## Limitations and When to Contact a Veterinarian Not every exposure needs an emergency visit, but some do. Use these as a guide. **Call poison control or your veterinarian the same day if:** - You saw your pet lick or eat a treated plant - Your pet walked through wet spray and groomed itself - Your pet has mild vomiting or drooling that started within hours of exposure - You are not sure what product was used **Go to an emergency clinic now if:** - Your pet is having a seizure or tremors - Your pet is struggling to breathe - Your pet is collapsed or cannot stand - Your pet swallowed concentrated product - Vomiting will not stop **Schedule a routine visit if:** - Your pet had a small, known exposure and seems normal, but you want a check - Your pet has ongoing stomach upset after being near treated areas - You want help choosing pet-safe lawn and garden products Individual cases need a veterinarian who can examine your pet, ask about the product, and decide on testing and treatment. Phone guidance is helpful, but it cannot replace an exam when your pet is sick. ## Frequently Asked Questions ### Can my dog get sick from walking on a lawn that was sprayed yesterday? Usually not, if the product is fully dry and your dog did not eat treated grass or lick its paws heavily. Dried residue on a lawn is a low-dose exposure. Wipe your dog's paws after the walk and keep it away from any still-wet patches. ### Is Roundup worse for cats than dogs? Cats tend to show higher glyphosate levels in their urine than dogs, which may reflect grooming habits and closer contact with treated surfaces. That does not mean cats are poisoned more often, but it does mean grooming cats deserve extra attention after outdoor time. ### Should I make my pet vomit after it licks herbicide? No. Do not induce vomiting unless a veterinarian tells you to. Some formulations can irritate the esophagus or cause aspiration if vomited, and the decision depends on what was swallowed and when. ### How long does glyphosate stay in a pet's body? Glyphosate and its breakdown product are excreted mainly in feces, and excretion happens over a relatively short window after exposure. Repeated low-level exposure from food, water, and the environment can keep levels detectable over time. ### Are there pet-safe weed killers? Hand pulling, mulching, and boiling water are the safest options because they avoid herbicide residue entirely. If you use any herbicide, follow the label reentry time and keep pets off the area until it is dry. Ask your veterinarian before using any product around pets with health problems. ### Can glyphosate cause cancer in pets? Cancer risk from glyphosate in pets is not well established in veterinary research. Most concern comes from human studies and laboratory work, and the results are debated. If you are worried about long-term exposure, reducing your pet's contact with treated areas is a reasonable step. ## Related Articles - [Common Houseplants Toxic to Cats and Dogs](/knowledge/veterinary-medicine/toxicology-and-food-safety/common-houseplants-toxic-to-cats-and-dogs) - [Plants That Aren't Toxic To Cats And Dogs](/knowledge/veterinary-medicine/toxicology-and-food-safety/plants-that-aren-t-toxic-to-cats-and-dogs) - [Roundworm Treatment for Cats: Safe Dewormers and Prevention](/knowledge/veterinary-medicine/parasitic-diseases/roundworm-medicine-for-cats) - [Non Toxic To Cats Houseplants](/knowledge/veterinary-medicine/toxicology-and-food-safety/non-toxic-to-cats-houseplants) - [Houseplants Toxic For Cats With Pictures](/knowledge/veterinary-medicine/toxicology-and-food-safety/houseplants-toxic-for-cats-with-pictures) - [Are Lilies Toxic to Cats?](/knowledge/veterinary-medicine/toxicology-and-food-safety/are-lilies-toxic-to-cats) - [Is Roundup Toxic to Cats? Herbicide Safety Facts](/knowledge/veterinary-medicine/toxicology-and-food-safety/roundup-toxic-to-cats) - [Is Glyphosate Toxic to Cats? Herbicide Safety Guide](/knowledge/veterinary-medicine/toxicology-and-food-safety/glyphosate-toxic-cats) - [Is Glyphosate Toxic to Dogs? Herbicide Safety](/knowledge/veterinary-medicine/toxicology-and-food-safety/glyphosate-toxic-dogs) ## References 1. [Widespread occurrence of glyphosate in urine from pet dogs and cats in New York State, USA](https://pubmed.ncbi.nlm.nih.gov/31096409/). The Science of the total environment, 2019. 2. [Occurrence and profiles of glyphosate and aminomethylphosphonic acid in paired urine and feces of humans, cats, and dogs](https://pubmed.ncbi.nlm.nih.gov/40311231/). Environment international, 2025. 3. [Glyphosate and its formulation Roundup impair pig oocyte maturation](https://pubmed.ncbi.nlm.nih.gov/32686734/). Scientific reports, 2020. 4. [A Pilot Study of Gene Expression Modulation from Antioxidant System of Killifish Austrolebias charrua After Exposure to Roundup Transorb®](https://pubmed.ncbi.nlm.nih.gov/39068350/). Bulletin of environmental contamination and toxicology, 2024. 5. [In vivo and in vitro evaluation of the effect of glyphosate (Roundup) on Toxoplasma gondii](https://pubmed.ncbi.nlm.nih.gov/34475653/). Journal of parasitic diseases : official organ of the Indian Society for Parasitology, 2021. ## 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)