Today I found one of my young RIR hens up on a perch not putting weight on her leg. When I got a closer look, I realized that her leg just above the foot was wrapped extremely tightly in string, and the string must have been there for a while, because it was embedded deeply in the skin to where some of it could not be removed, and a huge infected lump surrounded the area. I cut open the abscess so it could drain and got as much as the string off as possible, but there is still some of it wrapped right around the bone to where I will have to cut into the skin really deep to get it out. I cleaned the wound out thoroughly, put on antibiotic cream, and wrapped it up with gauze and vet wrap, but the hen is still non-weight bearing. She is eating and drinking but I am afraid that if I don't get the rest of the string off the infection will not be able to heal and will spread or the leg will lose blood circulation and fall off. Should I cut deeper into the leg and try to get the string out, or should I leave it be? Help!