Looking into ostrich domestication might give you an idea of how it might apply to chocobos. I don't know anything about the training of ostriches for riding but I do have some information on the life cycle of an ostrich.(I'm not an ostrich farmer... just a fountain of useless information )
Lifespan: 30-70 years
Maturity: 2-4 years; females reach maturity sooner than males
Incubation period: around 45 days
chicks wander from parents roughly a week after hatching
chicks are independent around 3-4 months of age
chicks are adolescents and almost fully grown around 6 months of age
Lifespan: 30-70 years
Maturity: 2-4 years; females reach maturity sooner than males
Incubation period: around 45 days
chicks wander from parents roughly a week after hatching
chicks are independent around 3-4 months of age
chicks are adolescents and almost fully grown around 6 months of age