What a Nightmare Charlie Brown by Charles M. Schulz

"Dogs in the Arctic don't act like you," scolds Charlie Brown. "They pull sleds, and they're fed once a day on raw fish, or . . . "
   "Bleah!" says Snoopy, slurping up a second milk shake with his third pizza.
   "I just hope you can digest all that," says Charlie Brown. "Good night!"

   Good night and . . . Good Grief! Snoopy's having a nightmare! He's dreaming he's a sled dog in the Arctic . . . and he can't wake up!