Ferrets are a very simple machine(so to speak)they have the most simple digestive system it is almost a straight through tube,thats why they need a high protein diet,along with this they are also an animal that is prone to more maladies than any other.I have been very lucky with ferts and having kept them for the last 40yrs and have never had this particular disease that ended fatally,they have all recovered(maybe I'm just lucky,but for those that know me know better....don't you Basil)all I will say is good luck with it,but don't let it go on too long and cause unnecessary suffering.Just had a Jill die of natural causes and she was at least 9 yrs old and I took her on from a young lad that had her before me.....RIP a great worker.
Martin