Sasha, a 7 year-old female chocolate Labrador Retriever, was treated for necrosis after receiving a nasty rattlesnake bite. Four days after her initial veterinary visit, her leg was swollen and necrosis was well underway. Sasha was sent to Bioshield HBO for help. She received 6 hyperbaric oxygen presses over the next 5 days with positive results. Within 2 months from the date of injury, Sasha was completely healed.