Feeding Your King Snake: A Kings Diet. King snakes are carnivores and primarily feed on rodents in captivity. Prey Size: The size of the prey should be appropriately sized to the snake, generally no larger than the widest part of its body.
Timid snakes may require that you place their frozen/thawed prey item in front of their hide box so that they have a sense of seclusion when eating. Some snakes will not eat during their shed cycle, normally it is easy to tell if a snake is in shed by their milky colored eye caps.

The California Kingsnake will eat any animal or bird including other snakes, and even rattlesnakes. You can feed your King snake thawed rodents and mice. Feed them once a week. We compare the corn and king snakes directly here.

You can also provide appropriately thawed frozen rodents for kingsnakes. Remember not to microwave these snake food as the resulting hot spots can harm the snake. Moreover, always designate a separate freezer and area to freeze and thaw snake feed.
Avoid using the microwave to thaw frozen prey, as it can cause uneven heating, potentially resulting in burns to your snake or causing the prey to explode. Use Feeding Forceps.