Soft and juicy poultry meat is best obtained from a broiler.
Broilers are chickens that are specifically bred and raised for meat production. They are typically slaughtered between 6 to 8 weeks of age, which results in tender and succulent meat. In contrast, older hens and roosters have tougher meat due to their age and the fact that their muscles have developed more, making it harder to achieve a soft and juicy texture.
Ostrich and guinea fowl are also types of poultry, but their meat is leaner and has a different texture than chicken meat. While they can be cooked to be tender and juicy, they are not typically associated with soft and succulent meat in the same way that broilers are. Overall, if you're looking for soft and juicy poultry meat, broilers are the best choice.