fattening a ferret

Question
Hi, I have three ferrets and within the last few months one of my boys became aggressive with my girl causing major weight loss.. she is all bony now. She has been eating but not enough to gain weight. I am starting her on the duck soup but wanted to know how much to give her if she is still eating regular food and how long will it take to fatten her up to healthy weight?

Answer
Intra aggression shouldn't cause weight loss, at least not severe enough like it sounds.  You need to get her to a vet to make sure there isn't an underlying cause of the weightloss before you attempt to treat it.  Duck soup can help, but not if she is ill from a medical issue.