I just wanted to say that I think it is wonderful that you are taking on the responsibility of another fur baby.
We had a litter of pups dropped off at our door when we lived in the country (rott, lab mix) we got them to the vet and found good homes for all of them but one (it was a litter of 9)... the dogs did come around, learned that we were not going to hurt them ect... and the love they gave back was amazing.
Good luck, I imagine things will work out eventually with a loving home.