How long can ferrets go without food? I'm asking because my little sister hasn't been home in a while to really check on her little furball and I'm not allowed to mess with it or even go in her room for any reason or else I'll get grumbled at. I always make sure that my ferret has food so I've never really had to wonder about this. Poor thing is already skinny while mine is a total fatty lol. She's always making comments about how mine is bigger than her' s and honestly it's because mine always has food. I'm worried about the poor thing honestly. She's a year old while my baby boy is 16 weeks. She hasn't been out in a while either and I'm about ready to just go in there and deal with the consequences, no animal should have to deal with that.