Update on bitch. Its been a few weeks since she had the nail off. The swelling of pad has not gone down but she is walking on grass with no lameness until she walks on stones or rough tarmac then its onto 3 legs. I have been soaking her paw everyday in potassium permanganate as suggested. The toe is not swollen itself but the pad is quite large underneath not sure what to do now apart from take her back to vets for possible amputation of the toe .