Leaves of drumstick plant are eaten

One of the plants the domain investor wanted for many years is a drumstick or moringa plant.
The local nursery did not have any plant in stock, despite visiting the nursery repeatedly
A few plants were available for sale from the medicinal plants board van
The stem of some of these plants was broken, only one small plant without a broken stem was available.
However when the plant was kept in the garden, the leaves of the plant were eaten within a few days