(VIDEO-AT-LINK)Madrid health authorities have put down Ebola patient Teresa Romero Ramos' dog, Excalibur, despite protests. The animal was sedated prior to euthanasia to avoid its suffering, the Health Ministry of Madrid said in a statement. More than 330,000 people had signed a petition on Change.org to save Excalibur. Ramos, a nurse's assistant, is in isolation after testing positive for the deadly Ebola virus earlier this week. Health authorities worried her dog may have also become infected. Which warrants the questions: Can dogs really get Ebola and spread it to humans? What about other animals? In Africa, Ebola infection "has been...