Norwegian explorer
Roald Amundsen's party ate sled dogs during his expedition to the South Pole. This allowed the party to carry less food, thus lightening the load. When comparing sled dogs to ponies as draught animals he also notes:
there is the obvious advantage that dog can be fed on dog. One can reduce one's pack little by little, slaughtering the feebler ones and feeding the chosen with them. In this way they get fresh meat. Our dogs lived on dog's flesh and
pemmican the whole way, and this enabled them to do splendid work. And if we ourselves wanted a piece of fresh meat we could cut off a delicate little fillet; it tasted to us as good as the best beef. The dogs do not object at all; as long as they get their share they do not mind what part of their comrade's carcass it comes from.