castor and pollux

Either way, the myth goes that Castor fell in battle. Pollux, stricken with grief for his fallen brother, convinced Zeus to let him share his immortality with Castor; allowing Castor to spend alternate days on Mt. Olympus with the immortals in exchange for Pollux spending alternate days in Hades with the mortals. Brotherly love, indeed.
On a lighter note, cats don't hate birds.