You may also give them white chicken or turkey, fish, tuna packed in water and peanut butter as added protein. We do not give them citrus as it is too acidic for a mynah. A cuttle bone is hung in the flight which they may or may not touch until the urge to breed begins. They have a bowl of apple juice or whole milk every day. We later discovered that milk is preferred when breeding and, yes, they can digest it, It provides them with vitamins A, C and D as well as calcium to lay eggs.
Milk also helps to inhibit iron storage in the liver which is a main problem for many softbills.
A long shelf was placed five feet high on which we placed three Cockatiel size nest boxes with the holes made two inches larger. The pair has used all three. The hen, however, seems to prefer the first one. Being large birds, they sleep in separate nest boxes at night. The male sleeps in the one next to the hen although it has no bedding in it.