Some strains of flu are most definitely transferrable to ferrets. Most of the time it will take a couple of weeks of intensive care to get a ferret through it, but if you have older ferrets, or ferrets compromised by other health issues, then contracting a nasty strain of the flu could be enough to push them to death's door. 3 years ago the flu hit my home hard. All 6 ferrets that I had at the time got it. It took a couple of weeks of children's Triaminic and round-the-clock water vaporizers to get them through it, not to mention much hand-feeding of soup. When a ferret's nose is blocked and it can't breath well, it also doesn't want to eat or drink, which only compounds the problem. I did end up losing an older girl during that flu outbreak who had insulinoma and adrenal disease. She had been doing well for a long time with both diseases and regular meds, but when the flu hit, her respiratory system went into extreme distress, and I had to put her to sleep. It was a very, very hard lesson to learn. So, please, do everything you can to keep your ferrets secluded from the flu virus. Wash your hands constantly and even wear a surgeon's mask when around them if you have the flu. Jeff In Loving Memory of Neo, Trinity, Morphy, Baby Girl, Dozer, Possum, Pip, Pop, Sabrina, Minnie Mouse, Hunny, Misty, Frodo, Baggins, and Mr. Parker Caring for Luna, Boomer, and Zoomer [Posted in FML 7570]