I have a Jill which I have had for many years and I fed her on chudleys ferret food until the pet shop in which I got it came under new management and stopped selling it. So we ended up having to buy James welbeloved ferret food and within about a month or so she had suddenly gained a lot of weight. Like obese kind of weight. So we found a new supplier to get chudleys and have been giving her that since and she appears to have lost some weight however now she has lost a lot of weight on her shoulders and legs and just genuinely weak. She did appear to be getting better and walking but she seem