He felt the small, human-like animal stroke at his muzzle.  He heard that it had some food in its bag.  He climbed up onto another desk, and lowered his muzzle so that Marshall could get off.  He rips the backpack open with his claws and starts tearing through the textbooks in there until he finds the sandwich Marshall promised him.  The huskie scarfs it down in a matter of seconds, but is still unbelievable hungry, so he looks up at Marshall again.