My Golden Retriever has nerve damage. Is her leg injury permanent?

Poor Georgia! Unfortunately it is possible that she may have permanent damage due to her accident, especially since her injury occurred while she was a puppy and still growing. However, there may be a few things that may help her, including acupuncture, massage, chiropractic treatment, rehabilitation exercises and physiotherapy, as you mentioned. It's also important that you keep her at a lean body weight and don't let her get overweight, as that would put extra strain on her joints. Talk to your vet about joint supplements to help support her joints, as the rest of her joints and legs will be taking on extra strain due to the fact that she cannot use her left front leg, which can make them more prone to injury and arthritis. Your veterinarian may also want to prescribe pain medication, as the fact that she cannot use her leg properly is likely causing pain in the affected limb and other limbs, as described above. Some types of pain medications are particularly good for nerve pain, and may be a good option for Georgia. The links below can help you find rehabilitation and acupuncture therapists near you that may help. Good luck, and I hope Georgia feels better soon!

http://www.tcvm.com/Resources/FindaTCVMPractitioner.aspx
http://www.caninerehabinstitute.com/Find_A_Therapist.html