I am as astoniushed as Robin. I am not sure if you know this, since
i do believe this is a joke, but baby birds must be turned or they
will get stuck to the shell and die, because when hatching comes
they wont be able to move and many things can happen, and most of
all if they're not turned the embryo will die because it canot grow
properly because it cannot turn around and all that.... They're not
like reptiles which you do not turn the eggs.