He/she isn't Like any human runner, sled dogs (canine "runners") are lean and "thin". Extra weight isn't good for them (or for any dog really). They aren't my dogs, but from a dog driver's perspective, I think they look great.
It's a comment I respond to frequently People are just worried that they don't get enough to eat and I like putting those thoughts to rest. If only everyone knew how many cookies we can go through in a day!