Paddy, a two-year-old black Labrador, is from an animal shelter that rescued him from abuse.

BBC: Last Updated: Monday, 3 March 2008, 13:15 GMT

Many people re-posted the images of the dogs staring sadly from behind bars at an animal shelter, and the hashtag for the campaign briefly became the top trending topic on Twitter in Mexico.

NPR: Officials: Possible 5th Killing By Mexico Dog Pack

On Monday, five-month-old Darwin was taken to a sanctuary after spending the night in a city animal shelter.

BBC: 'Ikea monkey' owner asks for her pet back