Give, but give until it hurts.
Neither fear nor self-interest can convert the soul. They may change the appearance, perhaps even the conduct, but never the object of supreme desire... Fear is the motive which constrains the slave; greed binds the selfish man, by which he is tempted when he is drawn away by his own lust and enticed (James 1:14). But neither fear nor self-interest is undefiled.
Until we consider animal life to be worthy of the consideration and reverence we bestow upon old books and pictures and historic monuments, there will always be the animal refugee living a precarious life on the edge of extermination, dependent for existence on the charity of a few human beings.
Love is not patronizing and charity isn't about pity, it is about love. Charity and love are the same -- with charity you give love, so don't just give money but reach out your hand instead.