Blind sled dog aided by brother

Sled dogs Poncho, left, and his blind brother Gonzo are hooked up for a run at the Muddy Paw Sled Dog Kennel, in Jefferson, N.H on Jan. 17, 2013. Poncho has taken to helping his blind brother on regular runs.

The kennel takes in rescues and "second-chance" dogs.

Credit: AP Photo/Jim Cole

Dogs are such marvelous creatures.