I am switching themes for a Wordpress site and hired a developer to do it. I have a lot of blog posts and they all have featured images. He says the only way he can transfer the images to the the new theme is to do it manually, one-by-one, which will take him a lot of time. All the other files for the site were transferred through FTP, no problem.
Does this sound right? Do Wordpress feature images not transfer from one theme to another?