Incubation period is 28 days, and after the young are hatched both the gander and the goose take care of them. Canada geese will aggressively defend their nest and young, often attacking intruders by striking hard blows with their wings. Canada geese are mainly grazers. During the fall and spring migration, they eat green shoots of grasses as well as waste grains. On the wintering areas they feed on both greens and grains.
Corn is also a favorite food.
The goslings eat tender grasses and other green herbage.