The 27-year-old singer, who adopted their furry friend in early 2017 when he was just “a weeks old,” revealed that Jagger suffered a “progressive condition” called Myelomalacia.

Halsey revealed via Instagram that their beloved dog Jagger died suddenly due to a "progressive condition" called Myelomalacia. Instagram/@carolinalekker.fc Halsey is mourning the loss of their ...

“Jagger was 5 years old and yesterday we lost him to a progressive condition called Myelomalacia,” she explained. “It is sudden and uncommon and unfair with a catastrophic prognosi ...

Along with sharing her favorite photos of Jagger, Halsey detailed his rapid decline following a myelomalacia diagnosis, which is a softening of the spinal cord resulting in acute paralysis.