I use BCP Pharmacy (http://www.bcpvetpharm.com)
 
they have liquid compounded pred which should be refrigerated to extend
shelf life (9 months) but does not need to be shipped on ice.  They can
compound most meds in any strength requested and they have enough flavors
(including raisin) to make your head spin.  For the household with one or
two ferrets on pred, I suggest the "vet chews" they are little treat size
chews that can also be compounded with pred (or other medications) and
come in yummy flavors.  My ferrets come running for these.  I switched to
the liquid as the number of ferrets in my household that need pred makes
the liquid more cost effective.
 
Their phone #: 800-481-1729 fax#: 713-771-1131
 
I have no affiliation other than being a very happy customer :o)
 
Dawn
[Posted in FML issue 4232]