There are many stories of animals refusing to accept that their babies are dead. One video of pigeons returning to the dead time and again, over a very long period, comes to mind; and this:
https://www.youtube.com/watch?v=UR680gr7PkM
Mother love is one of the most powerful forces on Earth.
I’m about to go out so can’t have any tears now, will watch later. A scene from the Little a House on the Prairie TV show has stuck with me for years. A father holding his deceased son, talking to Charles about his boy who is just sleeping. Just a show, but a heartbreaking scene.