There was a sad story yesterday about the deaths of a soldier and his dog. Lance Corporal Liam Tasker was killed in a gun battle with the Taliban in Afghanistan this week. His devoted bomb-sniffing dog Theo, witnessed his master’s death, then shortly after suffered a seizure and also passed away. It’s been said that the dog “died of a broken heart”. Is this possible? Or is it just sentimental tosh, made up to make people feel better in some way about a tragic outcome?