Went from pro plan to dog chow. Can’t tell a difference.
I did that every summer for years. It's straight Dog Chow now for me. Dogs don't get their energy from protein. They get it from glycogen.
Glycogen turns out to be a crucial piece of the metabolic switch. During the first few days of racing, sled dogs draw energy from glycogen stored inside muscle cells. But instead of depleting glycogen stores and tiring the muscles, the animals suddenly switch to a glycogen-sparing metabolism.