Related:

• Don't let the same dog bite you twice. -- Chuck Berry
• On his was back to the lobby, his cigarettes forgotten, he had to walk the length of the ranked phones.
  Each rang in turn, but only once, as he passed. -- William Gibson, Neuromance...
• Only adventurers of evil alignment think of killing their dog.
• Measure twice because you can only cut once.
• About the only thing on a farm that has an easy time is the dog.
• You own a dog, but you can only feed a cat.
• Law of the Yukon: Only the lead dog gets a change of scenery.