new to ferrets, not long had ours, we got two jills and a hob, jills being the oldest. put em in a three tier hutch tht we built but theres one which dont like goin out of the top tier. shes well skinny, theres food there if she wants it but she dont seem interested in it. we gave her some diced meat on her own and she ate tht but still didnt want too much of it. can anyone give me some advice on this please?