Does anyone have any expieriences with a lump like this in a fresh-out-the-shell chick? Is there any interventions reccomended if any?
It pulses when the chick makes any movements/vocalisations
To me it appears to look like a hernia. But I'm unsure.
From my experience it will probably correct itself. I would not intervene right away. Let the hatch finish, the chicks dry out, and then assess again later. That is fairly minor in size, so I think it will be fine.