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My cat's blood test: low hemoglobin, high creatinine. Is it serious?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 2 years and 1 month old | 10 lbs

I got my cats blood tests and it says haemoglobin is very low 9.4% and high creatinine-2 and urea-60 He hasn’t been eating well. Is it fatal? What treatment is advised for my cat? I’m very worried. Thanks

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on February 28th, 2018

Poor guy. I see elevate liver enzymes (ALT,AST) and kidney values on the paperwork you have attached here. Low hgb means that the red blood cells are not oxygenating well, but if the RBC count is also low (anemic) then that is a sign of chronic kidney failure. Cats can recover from kidney disease depending on the underlying cause. An abdominal ultrasound is needed to determine the cause of the kidney failure exactly, or a positive response to bloodwork is used as a means of determining a positive outcome. In most situations we treat the pet with fluid therapy to help idurese (flush out) the harmful toxins (BUN, CREA), get the pet started on a prescription kidney diet (ie. Hill's K/D, Royal Canin Renal) and also a supplement (Azodyl- which helps to remove toxins from the gut) can be given as well. The most concerning values for me on this bloodwork are the liver values (AST, ALT). It is not common for a cat to be in both kidney failure and to have abnormal liver values concurrently. THis raises suspicions for infectious diseases such as any number of tick diseases. I would recommend discussing with your vet about possibly doing a tick panel, if the history indicates tick exposure is probable. Also a FeLV/FIV test may also be indicated, depending on the complete CBC results, which you didn't post here. At the very least a liver protectant medication should be started, which is typically a medicine called Denamarin. Additional treatment may be needed depending on the underlying cause for the liver abnormalities. If you would like to discuss Toby's case further, then please feel free to request a consultatoin with either myself or another expert here. Toby's case is definitely a more complicated case where it is best to have a complete dialogue back and forth to get all the information you need to make the best decision moving forward with his care. I wish you all the best moving forward with Toby's care and I hope that he makes a full and speedy recovery. Take care.

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