Protestors organized by No-Kill New York, an animal rights group, created their own . And a page also was created on Facebook, garnering nearly 114,000 "likes."

Many people filled their own personal Facebook posts with pleas for their online friends to sign petitions and join the protest. Others took to Twitter to vent their frustrations and ask for support.

"Destroying a dog that had no history of aggression is folly and shames society," tweeted @DUPleader.

And @AliciaLaraLA tweeted: "Always wanted to go to Ireland but after all this with #LENNOX, Belfast is one place I'll never be visiting..."

Brad Shimmin, an analyst with CurrentAnalysis, noted that social networks not only served to build protests to try to save Lennox but gave people concerned about the situation a place to gather and share their frustrations and stories.