Fundadora Proanimal Chile: Giving dogs a voice
Here's a unique and somewhat sad example from Chile. The Fundadora Proanimal Chile hired agency Satvia to create a social movement to raise awareness of the mass killings of wild dogs, enforced by the mayor of San Joaquin. Dogs were armed with QR codes on their collars so onlookers could scan and receive a letter in the voice of the dog, as well as links for more information. It's not clear how much good was done by this unusual and clever campaign, but what an intriguing effort.
(Image sourced from http://www.creativeguerrillamarketing.com/guerrilla-marketing/giving-dogs-voice-qr-codes/.)