MADRID (AP) — The protesters, chanting “Assassins!” as they scuffled with police in front of a suburban Madrid apartment complex, made their demand clear: No matter how desperate officials might be to stop the spread of Ebola, an innocent pet must not be made a casualty.

By nightfall Wednesday, that campaign to save one family’s dog had turned in to a global outcry when the protest detonated online, generating hundreds of thousands of petition signatures and more social networking mentions than teen idol Justin Bieber. In the end, though, it did no good — Spanish health officials announced the pet had been euthanized and its body incinerated.