Hello mate,the vet said that snowie had a nurogical problem and its not worth her being messed about with as she would not be the same again and would not resume a working life,so the best thing is the let her go,she was getting worse she had convulsions yesterday morning,they also said chances are its not catching,but if any other of your ferrets get like this , a biopsy should be done,they seem fine though,i think it was that she had a genetic problem as she was only about 19 weeks.