In Norse mythology Thor is the name of the god associated with thunder, lightning and storms. While we're not sure how this Thor reacts to storms, we do know that he was under the weather with his future all cloudy when he arrived at the Vance County Animal Control shelter in North Carolina in mid-February. About one to two years old and a Boxer-Labrador Retriever mix, Thor was found as a stray wandering in someone's yard. He had multiple abrasions, for which he received treatment. But there was an even more serious problem: Thor tested heartworm positive.