Re: Six Year Old Daschund -- Rolo -- cushings
Hi Bgoods and welcome to you and Rolo! 
He is a handsome boy for sure!
Is Rolo still taking the Trilostane (Vetoryl)? If so, please stop now or tell the vet to stop it if she is still giving it. It sounds as if his cortisol could have dropped too low. Prednisone is the antidote for this. It sounds like you vet has a fairly good grasp on this but I wanted to make sure you know the Trilo needs to be stopped and pred given. Regardless, it is never wise to give treatment meds for Cushing's while a pup is sick. The meds are stopped til they are recovered, then restarted.
Have his electrolytes been checked? If not, that needs to be done asap.
I am looking forward to seeing those test results from when he was diagnosed. My Squirt had five Cushing's tests - LDDS, HDDS, ACTH, UTK panel, and two ultrasounds. After the second ultrasound they told me about a tumor on her spleen. Once it was removed, her cortisol returned to normal and has remained within range ever since. I share this to illustrate how a non-adrenal illness can cause false positives on these tests. Cortisol is one of the body's natural responses to stress of any kind and these tests cannot tell why the cortisol is present in such high levels.
On his ultrasound, what did they say about his adrenal glands? Were they visible?
How is he feeling this morning? Is the RI any better? Is he eating?
I know you are worried but please know you are not alone. We are here anytime you need to talk, even if it's just to vent your fears and concerns. We have broad shoulders and soft arms to go with our loving hearts.
Hope to hear from you soon and learn that he is doing better.
Hugs,
Leslie and the gang
"May you know that absence is full of tender presence and that nothing is ever lost or forgotten." John O'Donahue, "Eternal Echoes"
Death is not a changing of worlds as most imagine, as much as the walls of this world infinitely expanding.