Cat Electrolytes

Electrolytes are mineral substances in the body that carry an electrical charge when dissolved in a liquid such as blood or other bodily fluids. The charge that electrolytes carry allows them to conduct electricity and participate in a variety of physiological processes in the body. Some of the key electrolytes in the body include sodium, potassium, calcium, magnesium, and phosphorus. These electrolytes play critical roles in maintaining fluid balance, muscle nerve function, and heart health.

Electrolytes are essential to the proper functioning of the body, including the body of a cat. They help regulate fluid balance, which is crucial to the normal functioning of cells, tissues, and organs. Electrolytes also play a key role in maintaining healthy muscle and nerve function. They also help regulate the acidity and alkalinity of the blood, which is critical for the body to function properly. When there is an imbalance of electrolytes, it can cause disruptions in the normal functioning of these systems, leading to a variety of health issues.

The following are the common electrolytes in cats:

  1. Sodium (Na+): Sodium is an essential electrolyte that helps regulate fluid balance in the body. It is involved in transmitting nerve impulses and contracting muscles. Sodium is also important in maintaining blood pressure and helps keep the right balance of fluids inside and outside of cells. In cats, normal blood sodium levels are typically between 140-160 mEq/L.
  2. Potassium (K+): Potassium is an essential electrolyte that helps regulate fluid balance in the body, acid-base balance, and is involved in muscle contractions and heart function. Normal blood potassium levels in cats are typically between 3.5-5.5 mEq/L.
  3. Calcium (Ca2+): Calcium is an important electrolyte for bone health and is also involved in muscle contractions and nerve signaling. Normal blood calcium levels in cats are typically between 8.5-11.5 mg/dL.
  4. Magnesium (Mg2+): Magnesium is involved in many enzymatic reactions in the body and is important for the normal functioning of the heart, muscles, and nervous system. Normal blood magnesium levels in cats are typically between 1.5-2.5 mg/dL.
  5. Phosphorus (P): Phosphorus is important for bone health and is involved in energy metabolism and the formation of DNA and RNA. Normal blood phosphorus levels in cats are typically between 3.0-7.0 mg/dL.

Electrolyte Imbalances in Cats

Electrolyte imbalances in cats can be caused by a variety of factors, including:

  1. Illness: Certain illnesses, such as kidney disease, liver disease, and diabetes, can cause electrolyte imbalances in cats. These illnesses can affect the body’s ability to regulate fluid and electrolyte balance, leading to imbalances.
  2. Dehydration: Dehydration can also cause electrolyte imbalances in cats. Dehydration can occur when a cat does not drink enough water or loses excessive amounts of fluid due to vomiting, diarrhea, or other causes.
  3. Medications: Some medications, such as diuretics, can cause electrolyte imbalances by increasing the elimination of electrolytes from the body.
  4. Other factors: Electrolyte imbalances can also be caused by other factors, such as prolonged exercise, changes in diet, or exposure to heat.

Symptoms of electrolyte imbalances in cats include:

  1. Lethargy: Cats with electrolyte imbalances may show signs of lethargy or decreased energy levels.
  2. Muscle weakness: Electrolyte imbalances can cause muscle weakness and can affect the ability of the muscles to contract properly.
  3. Heart arrhythmias: Electrolyte imbalances can also cause heart arrhythmias, which are abnormal heart rhythms. These arrhythmias can cause the heart to beat too fast, too slow, or irregularly.
  4. Other symptoms: Other symptoms of electrolyte imbalances in cats can include loss of appetite, vomiting, diarrhea, and seizures.

Testing for Electrolyte Imbalances in Cats

Electrolyte imbalances can be diagnosed through blood and urine tests, among others.

Blood tests can be used to measure the levels of electrolytes in the blood. A comprehensive metabolic panel (CMP) is a blood test that can provide information about the levels of several electrolytes, including sodium, potassium, chloride, calcium, and magnesium. The CMP can also provide information about other metabolic functions, such as liver and kidney function. A basic metabolic panel (BMP) is a simpler version of the CMP that includes tests for fewer electrolytes.

Urine tests can also provide information about electrolyte imbalances. A urinalysis is a test that examines a sample of urine to detect abnormalities such as the presence of protein, glucose, blood, or bacteria. It can also provide information about the levels of electrolytes in the urine. A urine specific gravity test measures the concentration of the urine and can help determine if the cat is dehydrated. If the specific gravity is low, it can indicate that the cat is not able to concentrate urine properly, which can lead to an electrolyte imbalance.

In addition to blood and urine tests, other tests may be performed to diagnose electrolyte imbalances in cats. These include:

  1. Blood gas analysis: This test measures the levels of electrolytes in the blood as well as the pH and oxygen levels. It can be used to diagnose acid-base imbalances and respiratory problems.
  2. ECG: An electrocardiogram (ECG) is a test that measures the electrical activity of the heart. It can be used to diagnose electrolyte imbalances that affect the heart, such as hyperkalemia (high potassium levels).
  3. Imaging tests: Imaging tests such as X-rays or ultrasounds can be used to diagnose underlying conditions that may be causing the electrolyte imbalance.

Electrolyte Replacement for Cats

The specific treatment for electrolyte imbalances will depend on the underlying cause and severity of the imbalance.

Oral electrolyte supplements can be used to treat mild to moderate electrolyte imbalances in cats. These supplements are usually given in the form of a flavored liquid that can be added to the cat’s food or water. They contain electrolytes such as sodium, potassium, and chloride, and are designed to replace fluids and electrolytes lost through vomiting, diarrhea, or excessive urination.

Intravenous (IV) fluids may be necessary in cases of severe electrolyte imbalances or dehydration. This is especially true if a cat is unable to eat or drink on its own or has lost a significant amount of fluid through vomiting or diarrhea. IV fluids contain electrolytes such as sodium, potassium, and chloride, as well as glucose to provide energy. IV fluids are typically administered by a veterinarian in a veterinary clinic or hospital setting. The cat may require hospitalization for a period of time to receive IV fluids and close monitoring of their electrolyte levels.

As a precaution when administering IV fluids, it is important to monitor the cat’s electrolyte levels closely to ensure that they do not become too high or too low. Rapid or excessive correction of electrolyte imbalances can be harmful and potentially life-threatening.

The Role of Diet and Lifestyle in Electrolyte Balance

One of the most important factors in maintaining electrolyte balance in cats is hydration. Cats are obligate carnivores, which means that they get most of their moisture from their food rather than from drinking water. However, it is still important to ensure that cats have access to clean, fresh water at all times, especially if they are on a dry food diet. Dehydration can lead to an imbalance in electrolytes, especially sodium and potassium. It is important to encourage cats to drink water, and to provide wet food to help ensure that they are getting enough moisture in their diet.

A balanced and nutritionally complete diet is important for maintaining electrolyte balance in cats. Commercial cat foods are formulated to contain appropriate levels of electrolytes, including sodium, potassium, chloride, calcium, and magnesium. In addition, certain foods are naturally high in electrolytes, such as meat, fish, and eggs. It is also important to note that certain medical conditions, such as kidney disease, can affect the way cats process electrolytes, and may require adjustments to their diet or additional electrolyte supplementation.

Lifestyle factors such as exercise and stress can also impact electrolyte balance in cats. Exercise can cause cats to lose fluids and electrolytes through sweat, so it is important to ensure that they have access to water and are not overexerted, especially in hot weather.

Stress can also impact electrolyte balance, as the body may release hormones such as cortisol that can affect fluid and electrolyte levels. It is important to minimize stressors for cats and provide a calm and predictable environment.


It is important to maintain a proper balance of electrolytes in the body to ensure proper functioning of cells, tissues, and organs. Electrolyte imbalances can occur due to a variety of factors, including illness, dehydration, medications, and other factors. If an imbalance occurs, it can lead to a variety of health issues, including dehydration, muscle weakness, heart arrhythmias, and other conditions.

It is important to diagnose and treat electrolyte imbalances in cats. Treatment may include electrolyte supplements, adjustments to medications, diet and lifestyle changes, and other interventions as needed. It is important to address electrolyte imbalances promptly to prevent further health problems in cats.

Petralyte Hip and Joint Electrolyte Supplements for Cats Image of White Persian Cat in a Boat on a Canal

Interested in learning more?

Read: Dog Electrolytes.

Share this post

APA Citations

Goggs, R., De Rosa, S., & Fletcher, D. J. (2018). Multivariable analysis of the association between electrolyte disturbances and mortality in cats. Journal of feline medicine and surgery, 20(12), 1072-1081.

Goggs, R., Myers, M., De Rosa, S., Zager, E., & Fletcher, D. J. (2017). Chloride: sodium ratio may accurately predict corrected chloride disorders and the presence of unmeasured anions in dogs and cats. Frontiers in Veterinary Science, 4, 122.

Boag, A. (2018). Electrolyte and acid–base balance. BSAVA Manual of Canine and Feline Emergency and Critical Care, 44-54.

Canei, D. H., Pereira, M. E., de Freitas, M. N., Trevisan, Y. P. A., Zorzo, C., Bortolini, J., … & Sousa, V. R. F. (2021). Biochemical, electrolytic, and cardiovascular evaluations in cats with urethral obstruction. Veterinary World, 14(8), 2002.

Pachtinger, G. E. (2016). Feline Hepatic LipidosisEMERGENCY MEDICINE8.

Tasker, S., MacKay, A. D., & Sparkes, A. H. (1999). A case of feline primary hypoadrenocorticism. Journal of Feline Medicine & Surgery, 1(4), 257-260.

Skelly, B. (2016). Electrolyte imbalances. In BSAVA manual of canine and feline clinical pathology (pp. 142-164). BSAVA Library.


Villaverde, C., & Chandler, M. (2022). Commercial vs Homemade Cat Diets: What you need to know. Journal of Feline Medicine and Surgery, 24(5), 415-428.

2 thoughts on “Cat Electrolytes

  1. Pingback: Dog Electrolytes - Petralyte

  2. Pingback: Your Pet as a Business Partner - Petralyte

Leave a Reply

Your email address will not be published. Required fields are marked *