We often take our Greyhound to blood donation events and he always has a full set of blood tests. His Creatinine and Urea are usually slightly up but this last time they were up a bit more. The readings were 215.3 umol/l for the Creatinine and 10.3 mmol/l for the Urea. We took him to our vets and they were initially surprised the blood bank was making a fuss but repeated the tests and have found them to still be elevated. The vet is unsure what this could be in an otherwise fit and healthy dog. He's only 5 too. Apparantly it is odd for them both to be up? The vet is going to have a word with some other vets tomorrow and ring us back. I was just wondering if anyone else has seen this?