When the eggs had hatched the tadpoles created PGE. Although the females laid eggs, none hatched. Vinata became jealous as her eggs had not hatched. When they are newly hatched, frog larvae feed on the yolk of the egg. Endangered birds and butterflies are also hatched and reared at Ocean Park. Pets can also have eggs that can be hatched. First, the salmon are hatched from eggs and raised on land in freshwater tanks. Bluebirds may begin breeding the summer after they are hatched. Both sexes help feed the newly hatched eaglet. They hatched 15 weeks after being laid. Their caps were supposedly the remnants of the egg from which they hatched. Hence all three chicks are hatched the same day. Once the chicks have hatched their roles shift drastically. Every day, one egg is hatched. Reintroduced bustards also hatched chicks in 2010.