yes and no,
a ferret will come into season once the daylight times start getting longer, unless she is mated, she will stay in season, years ago ferrets wer'nt looked after as good as they are now, and therefore, being so close to the ground, picked up infections, via the rear end, resulting in death,
nowdays as we take more care of our ferts, its not a done deal that they WILL die, but still could
if a jill is not mated, but kept in a clean enviroment then theres less chance of infection
or
she can be taken to a vet and given a jill jab, to get her out of season
or
pair with a vasectam