Food is food, and animals have no compassion for other species. It is very weird when herbivorous species eat animals. Hippos occasionally eat carrion, too.

People are always surprised when turkeys and chickens eat vertebrate prey--bugs are fair game, but when a chicken I raised stole dead mice from the bucket to run away and eat them, that freaked people out. Meat is meat.

Most birds, even--especially--songbirds are carnivorous predators. Chickadees and robins eat animals (little ones) whenever they can.