For the folks here whose dogs have been diagnosed with both Cushing's and Diabetes, here are some links which may be helpful.

Therapy of Concurrent Diabetes Mellitus and Cushing's Syndrome
Canine and Feline Endocrinology and Reproduction
Edward C. Feldman and Richard W. Nelson, 2004
http://books.google.com/books?id=elPuvsucuY8C&pg=PA292&dq=Therapy+of+Concu rrent+Diabetes+Mellitus+and+Cushing's+Feldman&hl=e n&sa=X&ei=mbVBUe_3KrG04AP-wICYAQ&ved=0CDYQ6AEwAA#v=onepage&q=Therapy%20of%20 Concurrent%20Diabetes%20Mellitus%20and%20Cushing's %20Feldman&f=false"

Q & A: Diagnosing Cushing's Disease in Dogs with Diabetes Mellitus
Insights into Veterinary Endocrinology (January 22, 2012)
Dr. Mark E. Peterson
http://endocrinevet.blogspot.com/201...edium=facebook

Link to the "Vetsulin" (Intervet) website brochure, about dogs with Diabetes:
http://www.vetsulin.com/PDF/Vetsulin...r-Brochure.pdf

Another part of the Intervet website, with information about managing canine diabetes:
http://www.cat-dog-diabetes.com/dogs...g-diabetes.asp


Link to the original Pets with Diabetes website. Although it is now inactive (i.e. it has not been updated for several years) there is alot of excellent information there:

*note: the petdiabetes.org site has been offline since June 2008, but the site has been archived in two locations.

See here for the petdiabetes archived site:
http://www.indulgedfurries.com/petdiabetes/contents.htm

Or here:
http://www.caninediabetes.org/pdorg/
http://www.caninediabetes.org/pdorg/contents.htm

The archived petdiabetes site can also be seen here:
http://web.archive.org/web/200609261...g/contents.htm

There is also a messageboard associated with the petdiabetes site:
http://petswithdiabetes.yuku.com