We ourselves have not experienced blackheads on ears, though we do have a adrenal gland survivor, who still hasn't grown all his hair back, and still gets blackheads.. but, I just wanted to suggest that maybe (only maybe, and only from my experiences with some cats) you may want to investigate further IF, and only IF, your ferret gets more sunshine then most do..not trying to scare you as this is remote. But, some of the cats we owned when we were young had very light coloring and or were simply pure white, and use to get sunburn on the tips of the ears.. which lead to small scabs ( blackhead looking things) which were infact sun cancers.. not saying this is the case... just that I wanted to raise the issues of ferrets and the possibilities of too much sunlight.. and the fact that they are not "daylight" animals..especially albino's however, I would also consider, things such as ear mites, and or just plain "scabs" from fighting ? if you own other ferrets and they playfight a lot, "some" have a tendency to bite ears. only some thoughts, as I have notyet experience blackheads on ears, so there may be many other reasons.. Darrin [Posted in FML issue 4688]