It seems that the joy of the owner of the company, "Twitter", the American billionaire Elon Musk, was not complete. His company, "Neuralink" for medical devices, is facing a federal investigation into allegations of possible violations of animal rights, in addition to complaints from employees of the company about accelerating experiments on animals, which caused death. Much of it unnecessarily, according to documents reviewed by Reuters and sources familiar with the investigation and the company's operations.