To solve this pipe puzzle, follow the lowest available outlet at each stage.
The milk first enters the central container. Its right-hand outlet is positioned slightly lower than the pipe leading left, so the milk flows toward the right-side chamber.
That chamber has two possible exits:
- The higher pipe leads toward Dog 3
- The lower pipe leads toward Dog 4
Because milk reaches the lower outlet first, it travels directly to Dog 4.
The correct answer is Dog 4.


