"[Both ponies and dogs] are desperately hungry," wrote Scott. "Both eat their own excrement. With the ponies it does not seem so horrid, as there must be a good deal of grain, &c., which is not fully digested. It is the worst side of dog driving. All the rest is diverting. The way in which they keep up a steady jog trot for hour after hour is wonderful. Their legs seem steel springs, fatigue unknown -- for at the end of a tiring march any unusual incident will arouse them to full vigour."
 Scott Polar Research Institute.
 R.F. Scott, diary, 19 February, 1911, quoted in Scott's Last Expedition, v.1.