Royal Canadian Mounted Police ( R.C.M.P. ) hitching sled dogs into their harnessSleddogs pull various sorts of sleds , from the small 25 pound ( 11 kg ) sprint-racing sleds , through the larger plastic-bottomed distance racing toboggan sleds , to traditional ash freighting sleds and the trapper 's high-fronted narrow toboggan . Sled dogs pull various sorts of sleds , from the small 25 l sprint-racing sleds , through the larger plastic-bottomed distance racing toboggan sleds , to traditional ash , freighting sleds and the trapper 's high-fronted narrow toboggan .