My old lady has had hyperthyroidism for over a year, and we've had to increase medication in May as it was no longer controlled. Due to this she's had two blood tests and results have some back with a urea of 13 (May 17) and 13.6 (June 17), I think the maximum in the normal range is around 9.9. Following the first result the vet said we would keep an eye on this as her SDMA was very slightly elevated but the second result has shown it's back within the the normal range. The vet said we'd keep an eye on it, but at the moment was ruling out early CKD which she originally thought was a possibility. Other than CKD, are there any other diseases/problems that would raise urea?