Lab value · K
Potassium in cats, explained
Potassium is an electrolyte essential for muscles and nerves. Cats with CKD often lose potassium in their urine.
What a higher potassium can mean
High potassium is less common in CKD cats but can happen in advanced disease or with some medicines.
What a lower potassium can mean
Low potassium is common in CKD cats and can cause weakness, poor appetite or a dropped head posture. Supplements are often used.
Why it matters in kidney disease
- Cats with CKD often lose potassium in their urine, and low potassium can itself affect kidney function.
- Signs can include weakness, poor appetite, constipation and, in more severe cases, a head that droops toward the floor. A drooping head is a reason to call your vet promptly.
- Supplements are common but must be dosed by your vet.
Questions to ask your vet
Ask your vet
- Does my cat need a potassium supplement?
- Could low potassium explain any weakness I’ve noticed?
Decode your cat’s K
Enter your cat’s values and get a plain-English summary, IRIS reference bars and questions for your vet.
Frequently asked questions
What is Potassium in a cat blood test?
Potassium is an electrolyte essential for muscles and nerves. Cats with CKD often lose potassium in their urine.
What does a high potassium mean in cats?
High potassium is less common in CKD cats but can happen in advanced disease or with some medicines.
What does a low potassium mean in cats?
Low potassium is common in CKD cats and can cause weakness, poor appetite or a dropped head posture. Supplements are often used.
What is a normal potassium level for a cat?
A typical feline reference interval is about Example only: 3.5 – 5.8 mmol/L. Use the range printed on your cat’s report — it differs between labs., but every lab sets its own range. The range printed on your cat’s report is the one to use.
The KidneyPaw app
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