From the Humane Society website, you can pledge even if you don't live in Missouri:
This November, Missourians will likely vote on a citizen initiative to save tens of thousands of dogs from suffering in puppy mills.
Unbelievably, large-scale puppy mills in Missouri are allowed to keep dogs in small wire cages, stacked on top of each other, for their entire lives. They often don't get exercise, sunlight, companionship, or human interaction -- they live in filth and excrement and suffer discomfort and injuries from standing on wire for years on end.
I just pledged to help save these puppy mill dogs and join Missourians for the Protection of Dogs, the coalition backing the Missouri ballot initiative, and which includes The Humane Society of the United States.
I hope you'll join me and sign the pledge as well -- and participate in the campaign that will save thousands of dogs
languishing in Missouri's puppy mills.