Annadhanam is best donations of all. donors are the only recipients of the bargaining power and the right time to come and save the defense.
Dharma shastra says that the best donations is annadhanam . the mind of enough can satisfy one mythically only in annadhanam . money ,cash, dress, jewel, earth , house, etc. buyers are likely to call everyone who looks appropriate ,if there are only a few ,they will not say no if you give more than that.
The general public is satisfied that the swan is put. No matter what he eats, he cannot eat more them on serving.