When Slick, who looks kind of like a long, tall, thin Border Collie, was rescued, he got so excited he had a heart attack. The nice lady who serves as Slick's communications director told me he was taken to Angell Animal Medical Center in Boston, where he was equipped with a pacemaker. He goes back once a year for a checkup. He's going in for his third checkup in January.
For Slick and his communcations director, every day is Christmas. He was wearing the collar shown when I met him.