Butch, It is your choice. Personally I could never send them money since they are opposed to all hunting of animals. Most of the humane orgs get support based upon good people's love and sympathy for pets (a noble sentiment) but have bigger, more strident agendas to modify the behavior of people which are NOTDB.
I use one of 3 methods if I don't want to kill or badly hurt the cat or dog. I use my pellet rifle with Beeman felt pellets, My AEG (airsoft), or my blowgun with blunt round ball tips. All will sting, but not penetrate the skin, even on a human. What I chose depends on what I have handy or the mood I am in. I don't believe in climbing a tree, pole or what have you to get an animal or bird down.