Okay, so it's probably nothing, but I just got the blood work via email that they ran on Diz last week. When the vet called, they said everything was fine, but when I looked at the results just now, it shows that both the BUN and BUN/Creatinine levels were above normal, but only slightly. Is this something I should investigate further, or should I take the vet's word for it that it's not a problem?

Jen 2 things to consider with slightly above normal numbers, if Dizzy is on a high protein diet could elevate numbers. You also mentioned in a previous post that Dizzy has been not feeling well lately and having loose stool on and off, slightly higher levels can also be because of slight dehydration. As long as you have a good relationship with your vet, I believe you got good advice from your vet. With those specific tests, ranges are wide because of variances such as high protein diet, dehydration. If the numbers were low, then it's more of a kidney function.

We had a sweet Russian blue cat who had chronic kidney failure, her numbers were frightening, I learned alot through my old vet in Florida on how to read certain tests. It's been awhile, so if someone knows more about these numbers give Jen and myself a heads up. I hope I put your mind slightly at ease Jen.
Keep us posted on how Dizzy is doing.
Renee

ditto the abpve - particularly the likelihood of slight dehydration and its effect on numbers (some of my blood work number routinely are just above normal cut off and husband always says "no worries" - yet he is always the first to jump if he thinks there is something off about my health

Awesome! Thank you both. Dehydration makes sense since he had been sick and it had been really hot. Definitely puts my mind at ease.