A South Carolina lifeguard is being praised after using his emergency training on an injured dog, WSAV reported. Finn, an English Lab, was badly hurt by a stingray on Hilton Head Island, and lifeguard Arsham Mirzaei helped stabilize him before he was taken for additional treatment. Here's what to know According to WSAV, Mirzaei was working with Shore Beach Service when Finn, a 2-and-a-half-year-old English Lab, was struck by a stingray and suffe…