o shit mate we have a bleedy cat aswell and i usually feed him in the morning before or after i check the ferrets so uts quite possible i've touched the cat and then touched the ferret aswell if this is the case then the cat will have to go, only good thing he does is keep the rats down around the chicken run....
See what the vet says first, before you go booting the cat out. My cat and ferrets live perfectly happily and healthily together.
thats if yi can get a vet with the knowledge to know what it is and how to treat it remember the flu is a virus and antibiotics are quite us