Elon Musk says his dog is now Twitter’s CEO – as company’s name gets quietly changed

Elon Musk has said his dog has replaced him as Twitter’s chief executive after appearing to back away from a pledge to step down. The billionaire SpaceX boss took over the day-to-day running of the social media platform after buying it for $44bn (£38bn) last October. After a tumultuous start to his tenure, which included thousands of staff sacked and warnings from regulators, Musk appeared to commit to quitting as CEO. He set a Twitter poll in motion last December, writing: “Should I step down as head of Twitter? I will abide by the results of this poll.” Reminded of…