Mutts: The penguin is back at the South Pole, and apparently learned his lesson.
Mutts: From that height, a sure bet.
Mutts: The penguin explains how he can fly, but not how he got all the way to where Mooch & Earl live.
Mutts: The suspension of disbelief continues ... or perhaps it's denial on the part of the penguin.
Mutts: The penguin makes it to Mooch and Earl's neighborhood, and the impossibility factor is acknowledged.