Bill & Ted always brought Martha along on their duck hunting trips. She
was better than a dog because she'd see a duck and say, "Oh, what a pretty
mallard," which would alert them to its location and also flush the duck out,
then after it was down she'd go pick it up and bring it back, saying, "Oh, you poor thing", and best of all she'd clean it and cook it for them... no dog does that!
And unlike a dog, she'd stand lookout when they crossed the No Trespassing signs and pick up their beer cans.