I would add that in the absence of some of the hallmark signs of Cushing's like voracious appetite, panting for no reason, and no pot belly - I wouldn't put her thru the stress of another round of testing myself. IF she does have Cushing's it will come to light in time - one thing will be the total inability to get control of the diabetes. But this takes time to determine. Treating the diabetes for a few months won't tell the tale. However I am not an expert on this disease by any means so I hope you are talking to the folk at one of the diabetes sites, either the forum or the FB group. They will be able to direct you better. Even if the forum isn't very active these days that is where I would start. Just like our site, it is always staffed by those who know that disease and are willing to chat with you.