Might the amateur amputation of her legs have some bearing on this?
No, seriously: How old is she, mate? And, considering the current tempratures, my own first consideration would be heat exhaustion. BAD for ferrets! If ye feel they may be getting a bit roasted, try to get ye hands on an eletric fan and point it into the cage so they might choose to get in front of it.
shes 6, we we thinking heat exhaustion weve got this book on ferrets and it says to bath them in water? gd idea about a fan mate il get six (one for each cage ) shes now in the living room in abox keep