FrançaisIs salt poisonous to dogs?
Yes, in large amounts. Too much salt can cause vomiting, then weakness, diarrhea, muscle tremors and seizures in dogs [1]. If your dog has eaten homemade play dough, a salt dough ornament, rock salt or a lot of table salt, or drank a lot of seawater, call your vet or a pet poison line now, even if it seems fine [3, 4]. Have the recipe or package, the amount and the time ready.
Salt poisoning is unlikely as long as the body’s sodium control works and fresh water is available [1]. Trouble starts when a dog takes in a large dose of salt at once, or cannot drink enough water to balance it.
Where the salt comes from
- Homemade play dough: flour, food coloring, oil and a large amount of salt [3]. In 14 dogs reported after eating it, 12 became ill [2].
- Salt dough ornaments: made for the holidays from homemade salt dough [3]. As few as 1 or 2 ornaments could make a dog very sick, and baked ornaments can also be hard to pass [9]. A dog that ate a salt and flour clay used for figurines died of the resulting high sodium [5].
- Table salt, rock salt and de-icers: including eating snow mixed with salt de-icer [3, 4].
- Seawater: dogs have developed high sodium after swimming or playing in the ocean without access to fresh water [1].
- Paintballs: their contents (such as glycerol, sorbitol and polyethylene glycol) pull water into the gut and can cause severe salt and electrolyte imbalances [8].
- Salt used to make a dog vomit: an old home remedy that has caused severe poisoning (see below) [1, 6].
Other sources reported in animals include badly mixed oral electrolyte solutions and some diarrhea remedies [1], and sodium phosphate enemas [3]. Like bread dough, homemade play dough is a kitchen hazard to keep out of reach.
Why too much salt harms the brain
Sodium is the main salt in the fluid outside cells, and it largely sets the blood’s osmolality, or concentration [10]. When blood sodium rises, water is pulled out of cells into the blood [1]. High sodium always means high osmolality, and the signs come mostly from brain cells losing water [10].
If sodium rises fast, brain cells shrink. The brain can pull away from the skull, which can tear blood vessels and cause bleeding [1]. This happens when high sodium develops quickly [1].
Reported figures in dogs: signs can appear after 2 to 3 g of salt per kg of body weight, and the lethal dose is about 4 g/kg [1]. In the play dough series, the lowest dose linked to clear signs was 1.9 g/kg [2]. Call your vet or a pet poison line whatever the amount.
Signs and timing
Vomiting usually starts within several hours of eating too much salt. Signs can then progress to weakness, diarrhea, muscle tremors and seizures [1].
- Early: vomiting, diarrhea, loss of appetite, lethargy, and strong thirst or more urine [3].
- Nerves: stumbling or walking drunk, disorientation, tremors, seizures, collapse and coma [3, 4].
- In the play dough series: vomiting in 9 of 14 dogs, excessive thirst and seizures in 4, more urine and tremors in 3, and high temperature in 2 [2].
- After paintballs: one dog had abnormal behavior and wobbliness on arrival, then seizures 4 hours after admission as its sodium kept rising [7].
In that paintball case, sodium kept rising after admission and the signs got worse [7]. Do not wait for signs before calling.
What the blood tests show, and why
The diagnosis rests on the history, the signs and a high sodium on the blood test [1]. Sodium and chloride are part of the electrolyte block, next to potassium. In the play dough series, blood sodium predicted how sick a dog would get better than the amount it had eaten [2].
- Abbreviation Na or sodium, in the electrolyte block with potassium (K) and chloride (Cl).
- Result 168 mmol/L in this illustrative line: above the interval. A sodium above 160 mEq/L points to salt poisoning when the history fits [1].
- Unit mmol/L or mEq/L: for sodium the two numbers are the same [15].
- Laboratory interval The example uses the dog interval of the Merck Veterinary Manual [15]; each laboratory sets its own.
- Flag H: above the interval. The vet will recheck sodium often, because it must come down slowly [1].
| Test | What can be found | Why it matters |
|---|---|---|
| Sodium (Na) | High (hypernatremia) | Above 160 mEq/L points to salt poisoning [1]; all dogs above 180 mEq/L had seizures in one series [2] |
| Chloride (Cl) | High, along with sodium | Salt adds sodium and chloride together, so both rise to a similar extent [11]; 180 mEq/L was reported in two dogs [5, 6] |
| Osmolality | High | High sodium always means high osmolality [10]; vets follow it with sodium during care [12] |
| Blood gas (acid-base) | Sometimes metabolic acidosis | Seen in a dog given salt to vomit [6] |
| Repeat sodium checks | Sodium falling over time | To make sure it comes down slowly, not too fast [1, 12] |
| Antifreeze test (after paintballs) | Can be falsely positive | Paintball contents can mimic antifreeze on the test, so tell the vet about paintballs [8] |
A falsely high sodium can also come from the sample itself, if water evaporates from a tube that was not sealed properly [10]. In a large hospital study, about 6% of dogs that had sodium measured had a high result, from many causes, not only salt [14].
Why the vet lowers sodium slowly
When sodium stays high, brain cells protect themselves by building up their own particles (called idiogenic osmoles), which hold water inside them [1]. If blood sodium then drops quickly, water rushes back into those brain cells and the brain can swell (cerebral edema) [1].
So the aim is to bring the dog back to a normal water and salt balance slowly, over 2 to 3 days, with sodium checked repeatedly [1]. A slower approach is recommended when high sodium has been present for longer [1]. Vets also watch osmolality and the dog’s nerve signs to prevent brain swelling [12, 13].
There is no antidote for salt. Care is hospital care: fluids chosen by the vet, seizure control and close monitoring [1, 2]. If the dog ate the salt recently and has no signs yet, the vet may decide to make it vomit with a medicine, and to watch it for several hours [1].
Never use salt to make a dog vomit
Salt was once recommended to make dogs vomit. It is no longer recommended, because it can cause deadly salt poisoning [1, 13]. Pet Poison Helpline states that salt and salt water should never be used to make an animal vomit [4].
In one reported case, an owner gave a dog about 100 g of cooking salt to make it vomit after it ate 10 g of chocolate, an amount that was not dangerous. The dog arrived in a coma with seizures and a sodium of 200 mEq/L, and needed 10 days to recover fully [6]. If your dog ate chocolate or anything else, call your vet: do not give salt, salt water or any home remedy.
While you call, Pet Poison Helpline advises letting your dog drink fresh water, unless it is vomiting [9].
Outlook
Severe salt poisoning can kill. A dog with a sodium of 211 mEq/L after eating salt clay died despite treatment [5], and a 2007 report was described as the first published survival of a dog with severe salt poisoning [6]. Dogs can survive with intensive care: the dog given salt recovered in 10 days [6], and a dog that ate paintballs and fell into a coma went home after 68 hours with a normal nerve exam [7].
In a study of 16,691 dogs at a teaching hospital, dogs with high sodium from any cause died in 20.6% of cases, against 4.4% of dogs with normal sodium, and the higher the sodium, the higher the risk [14]. Early treatment matters, so call before signs appear.
Related articles
All foods and products toxic to pets: toxic foods for dogs and cats.
En français : sel et chien.
Questions to ask your veterinarian
- What is my dog’s sodium, and how high is it above the interval?
- Are chloride and osmolality high too?
- How fast will you bring the sodium down, and how often will you recheck it?
- Is there a risk of brain swelling, and what signs should we watch for?
- If my dog ate paintballs, could the antifreeze test be falsely positive?
Get your dog’s emergency blood results explained.
AI DiagAnimals reads sodium, chloride, potassium and the other electrolytes together with your laboratory’s intervals, and prepares the questions for your vet. The service opens soon: leave your email to be told first.
Frequently asked questions
What should I do if my dog ate Play-Doh?
Call your vet or a pet poison line now, even if your dog seems fine, and say whether it was homemade or bought, how much and when. Homemade play dough contains a large amount of salt [3]. Do not make your dog vomit at home and never give salt [4]. While you call, you can let your dog drink fresh water unless it is vomiting [9].
Is Play-Doh toxic if ingested?
Homemade play dough can be: it is made with a large amount of salt [3], and 12 of 14 dogs reported after eating it became ill, some with seizures [2]. We did not find a published veterinary figure for the salt in store-bought modelling dough, so call your vet or a pet poison line with the package whatever the amount.
Will salt make my dog sick?
Salty foods can make a dog thirsty and pass more urine [16]. Large amounts of salt cause vomiting, tremors and seizures [1]. Signs have been reported from 2 to 3 g of salt per kg, and in one series from 1.9 g/kg [1, 2]. Call your vet or a pet poison line whatever the amount.
How quickly will a dog show signs of toxicity?
After too much salt, vomiting usually starts within several hours, then weakness, tremors and seizures can follow [1]. In one dog that ate paintballs, seizures began 4 hours after it reached the clinic [7].
How much play-doh is toxic to dogs?
In 14 dogs that ate homemade play dough, the lowest salt dose linked to clear signs was 1.9 g per kg of body weight [2]; the reported lethal dose of salt is about 4 g/kg [1]. As few as 1 or 2 salt dough ornaments could make a dog very sick [9]. Recipes vary, and blood sodium predicts the course better than the amount eaten [2]. Call your vet or a pet poison line whatever the amount.
Sources
- Thompson LJ. Salt Toxicosis in Animals. Merck Veterinary Manual, reviewed 2022, updated 2024. merckvetmanual.com/toxicology/salt-toxicosis/salt-toxicosis-in-animals
- Barr JM, Khan SA, McCullough SM, Volmer PA. Hypernatremia secondary to homemade play dough ingestion in dogs: a review of 14 cases from 1998 to 2001. J Vet Emerg Crit Care. 2004;14(3):196-202. doi.org/10.1111/j.1534-6935.2004.04027.x
- Pet Poison Helpline. Play Dough (Homemade). petpoisonhelpline.com/poison/homemade-play-dough
- Pet Poison Helpline. Salt. petpoisonhelpline.com/poison/salt
- Khanna C, Boermans HJ, Wilcock B. Fatal hypernatremia in a dog from salt ingestion. J Am Anim Hosp Assoc. 1997;33(2):113-117. doi.org/10.5326/15473317-33-2-113
- Pouzot C, Descone-Junot C, Loup J, Goy-Thollot I. Successful treatment of severe salt intoxication in a dog. J Vet Emerg Crit Care. 2007;17(3):294-298. doi.org/10.1111/j.1476-4431.2007.00230.x
- Graves B, Kielb J, Chalifoux N. Severe Neurological Signs and Hypernatremia Secondary to Polyethylene Glycol Paintball Ingestion in a Dog. J Am Anim Hosp Assoc. 2025;61(6):179-184. doi.org/10.5326/JAAHA-MS-7492
- Pet Poison Helpline. Paintballs. petpoisonhelpline.com/poison/paintballs
- Pet Poison Helpline. Salt Dough Ornaments. petpoisonhelpline.com/blog/salt-dough-ornaments
- eClinPath, Cornell University College of Veterinary Medicine. Sodium. eclinpath.com/chemistry/electrolytes/sodium
- eClinPath, Cornell University College of Veterinary Medicine. Chloride. eclinpath.com/chemistry/electrolytes/chloride
- Guillaumin J, DiBartola SP. A Quick Reference on Hypernatremia. Vet Clin North Am Small Anim Pract. 2026;56(1):51-56. doi.org/10.1016/j.cvsm.2025.09.007
- Kasai CM, King R. Hypernatremia. Compend Contin Educ Vet. 2009;31(4):E1-6. pubmed.ncbi.nlm.nih.gov/19517406
- Ueda Y, Hopper K, Epstein SE. Incidence, severity and prognosis associated with hypernatremia in dogs and cats. J Vet Intern Med. 2015;29(3):794-800. doi.org/10.1111/jvim.12582
- Merck Veterinary Manual. Serum biochemical analysis reference ranges. merckvetmanual.com/reference-values-and-conversion-tables/reference-guides/serum-biochemical-analysis-reference-ranges
- ASPCA Animal Poison Control Center. People Foods to Avoid Feeding Your Pets. aspca.org/pet-care/animal-poison-control/people-foods-avoid-feeding-your-pets
Laboratory methods and reference intervals vary. This article explains; it does not diagnose. For a decision about your pet, use the original report and talk to your veterinarian. Our editorial policy.