Salt

Symptoms reported in cats

Most serious first.

1. 1
   Neurological Deficits and Brain Damage Progressive (develops within minutes to hours as the sodium alters cell osmolarity) · The brain is uniquely vulnerable to rapid hypernatremia. As the sodium pulls water out of the brain's cells, it causes cerebral dehydration and physical cell shrinkage.
2. 2
   Acute Kidney Failure Progressive (hours to days as the toxicosis advances) · The severe, rapid systemic dehydration caused by the sodium drawing fluid out of the cells can overwhelm and destroy the kidneys, leading to acute kidney failure and death.
3. 3
   Severe Gastrointestinal Upset Within minutes to a few hours of ingestion · The influx of excessive salt causes direct osmotic irritation and inflammation of the gastrointestinal mucosa, triggering vomiting and diarrhea.
4. 4
   Cardiovascular and Respiratory Distress Within minutes to hours · These symptoms are often accompanied by an elevated body temperature and are secondary to the massive fluid shifts, electrolyte derangements, and systemic shock the body is experiencing.
5. 5
   Excessive Thirst and Urination Within minutes · The extreme thirst is the cat's biological attempt to restore osmotic balance4. The excess sodium circulating in the blood draws fluid out of the body's cells, leading to severe cellular dehydration, which the body frantically tries to correct by seeking water.

Important notes

While a small amount of sodium is essential for a cat's health, too much salt is toxic. A large ingestion of salt can lead to a dangerous condition known as salt poisoning or hypernatremia. This happens when high levels of sodium build up in the blood. The excess sodium in the bloodstream pulls water out of the body's cells in an attempt to balance itself. This process causes cells to shrivel and can lead to severe dehydration, especially damaging the brain and nervous system. The risk is highest when a cat consumes a lot of salt without access to plenty of fresh water to flush it out. Common sources of salt poisoning are human foods like potato chips, cured meats, or homemade play-dough. Symptoms include extreme thirst, vomiting, diarrhea, weakness, stumbling, and seizures. Salt poisoning is a medical emergency that requires immediate veterinary intervention.

• Toxic dose: approximately 4g/kg body weight is lethal; smaller amounts cause significant symptoms; even salty snacks fed regularly cause cumulative harm
• Mechanism: high serum sodium causes cell dehydration and cerebral oedema; severe disruption of neurological and cardiac function
• Symptoms: excessive thirst, frequent urination, vomiting, diarrhea, weakness, tremors, seizures; severe cases cause kidney failure and death
• Salty human foods (chips, cured meats, soy sauce) are the most common accidental exposure route
• If your cat ingests a large amount of salt or salty food, contact your vet immediately