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My dog's blood test has low potassium and high NA/K. What should I do?

Updated On September 23rd, 2025

my dog has a slightly high NA/K ratio (38) but a slightly low Potassium level (3.9) 14 months ago his potassium level was 4.7... what do I do?

1 Answer

Most Helpful Answer

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Answered By Ann Dion, DVM

Veterinarian

Published on October 22nd, 2018

Hello and welcome to Petco Pet Education Center, formerly Petcoach. Potassium levels change based on when animals ate, and their kidney function. Potassium is taken into the body through food, and urinated out through the pee. A potassium of 3.9 likely means he just didn't eat as recently as the 4.7 reading. A slightly high Na/K is likely due to the sodium level being a bit high (happens with dehydration), and the K being a bit low (not eating or vomiting). The values you have listed are not too concerning. The Na level of 149 is not too high or suggestive of Na toxicity. I would ask your vet about how these blood results relate clinically to the condition that you brought your dog into the clinic for, and why you had the blood tests run in the first place. Best of luck with your little one!

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