Leavey first sought to adopt Rex after the 2006 bomb blast. Later, when Rex developed facial palsy that ended his bomb-sniffing duties, Leavey petitioned the Marine Corps for his adoption. They were reunited in April 2012 through the intervention of Senator Chuck Schumer. Rex died on December 22, 2012.Click to see full answer. Likewise, people ask, how did Megan Leavey’s dog die?In 2012, Rex developed facial palsy, which ended his bomb-sniffing duties. Leavey was able to adopt him through the intervention of Senator Chuck Schumer, around April 2012. Rex died on December 22, 2012.Beside above, how long did Rex live with Megan Leavey? Rex, who lived well but not long — “a great eight months,” she said — in suburban comfort in her Valley Cottage, N.Y., home before he died in December 2012. Hereof, does Megan Leavey’s dog die? Megan Leavey. The dog is injured by an IED, but does not die in the movie.What did Rex die from? heart attack