Sodium (Feline)

Also known as:Na

Reference Range

Critical Low

<130

mEq/L

Reference Range

147-162

mEq/L

Optimal Range

149-160

mEq/L

Critical High

>175

mEq/L

Sodium maintains fluid balance and nerve function. Cats have slightly higher sodium than dogs.

Low

Low sodium in cats can be caused by kidney disease, GI loss, or over-hydration. Less commonly Addison's disease.

What to do:

Your vet will evaluate kidney function and overall hydration status.

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Feline Sodium: 140 mEq/L (Low)

Normal

Sodium maintains fluid balance and nerve function. Cats have slightly higher sodium than dogs.

What to do:

No action needed.

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Feline Sodium: 155 mEq/L

High

High sodium usually indicates dehydration, which is very common in cats with kidney disease or diabetes insipidus.

What to do:

Encourage water intake and discuss with your vet, especially if your cat is on a dry-food-only diet.

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Feline Sodium: 168 mEq/L (High)

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