[pitlove]

Yes BUN can be elevated with dehydration. Elevated BUN is not always a sign for concern. It is when both BUN and creatinine are elevated that it is concerning because creatinine is only elevated when there is a decrease in glomerular filtration.

If you haven’t already I would let the vet know what kind of diet he is on considering high protein diets can also cause elevated BUN. Again, not something that is always cause for concern depending on why it is elevated.