The vet seems to think my 13 yr old cat has Cushing's. I took him in a little over a month ago, with what I expected to be hyperthyroid, only to find out his BG is on the high side (324 at the vet, low to mid 200s at home - I am working on diet change before we try insulin). His other bloodwork was normal, with the exception of one of the liver levels being a tad high, but still in the normal range. What symptoms did your cats present and what testing did you use to confirm diagnosis? If he does have cushing's, I want to start treating ASAP before his skin/fur get worse (we are currently super flaky and have thinning of the hair in different locations).