The passion expressed by Terraria's community has fueled our ambitions to do justice for the original PC content, and with the delivery of this update, there really has never been a better time to get into Terraria and discover its delights. And below are the full patch notes for the hefty 1.2 update.
Although dog team drivers are often referred to as  mushers , and mush is thought by many to be the standard word to get dogs moving, the word is, in fact, not often used as it is too soft for a distinctive command.
Distance, Conditions and Speed. A sled dog's speed depends on a variety of factors, including weather, the planned travel distance and the condition of the trail. For shorter distances, sled dogs may average 10 to 14 miles per hour during the course of a day of mushing. If conditions are poor, such as extreme cold or fresh snow, the dogs' speed can drop to 6 or 7 miles per hour. In a sprint race that takes a day or two, sled dogs may reach up to 15 miles per hour. The size of the sledding team makes a difference; however, the team will travel only as fast as its slowest member. As well, the amount of weight the team is pulling will affect its overall speed.