How old are Feng Xuan crops fed every meal for 20 consecutive days?

Feng Xuan crops were fed 6 ml per meal for 20 days. According to relevant public information, the crop quantity in Feng Xuan for 20 days is 6 to 8 ml per meal, four times a day, and crops need to be emptied every other day. Cocktail parrots, alias Feng Xuan parrots and Turtle-tailed parrots, belong to the genus Cocktail Parrots and are distributed in Australia and New Zealand, including Australia, New Zealand, Tasmania and its nearby islands. It is one of the most common medium parrots in the world.