Skill
Energy (Duck Life 4 Classic)
Energy determines how long a duck can keep racing. Feeding raises the selected duck’s energy separately from its five racing skills.
Feeding
Buy a seed from the dispenser and let a duck eat it; drag the food or duck to target the recipient. Each seed raises energy by three levels, up to level 150.
Racing
Classic ordinary-race stamina lasts 2 + 2 × energy level seconds before exhaustion. This race meter resets for the next race; the stored energy stat is not a consumable stock of food.
Final entry
The final race requires level 150 in all five racing skills. Energy does not count toward this requirement.
Food comparison
Purchased seeds also raise energy by three levels in the original Flash game.
Across the games
Compare games and editions on the 
Energy page.