rein-cow
 n.— «In the Dairy Farmers of Canada ad, Santa heads out on Christmas Eve, his sleigh pulled by the antlered milkers. They’re led by the red-nosed “rein-cow,” also known as Melissa, a nine-year-old Holstein.» —“Area cows in star roles as Santa’s sleigh team” by Debora Van Brenk London Free Press (Ontario, Can.) Dec. 6, 2004. (source: Double-Tongued Dictionary)