i only have one fert unfortantly but thats due to her being ferret mean. i tried to get her a friend but she made him all bloody then i tried a male and she did the same thing.
it is better to get two so they will have another ferret to play with. mine is a house runner sept when shes eating going to the bath room or sleeping other then that she had run of the house. lots of toys and she loves going for swims in her kiddie pool outside specailly when her toys are in there.