I'm not a veterinary surgeon. But the first step starts with you. If yes, you know why, and you can tell more people why theirs should be. The venues are limitless, but places to get the word out effectively include local morning talk TV, local talk radio, civic groups such as Rotary, as well as schools in the area. Schools are the best place to spend your time.
Young minds are open to new ideas, to concepts that include caring.
Children, in contrast, don't yet have preconceived notions, and they can sometimes be potent persuaders of parents.