My experiences with adrenal ferrets doesn't support the relationship.
I have had 11 ferrets, and 6 have been adrenal.  While most have been
"hyper", my second most laid back ferret had the worst case, while my best
ferret buddy's calmest least hyper also had an adrenal tumor.  Conversely,
her most hyper little girl is her healthiest.  Hmmm - come to think of it,
since most ferrets are little maniacs, how do we define "hyper" here ???
 
Hugs 'n Dooks from Joanne and the Seven Wonders of the World (Dooker,
Dudley, Sugar, Taz, Precious, Peaches, and Maximus the maximum ferret)
[Posted in FML issue 3214]