The injuries were too much for the pregnant mare, but 20 other horses that were in a southwest Missouri barn that collapsed under the weight of ice and snow are coming along, their owner and a veterinarian said.

Robin Ramirez has been spending 12 hours a day caring for her horses since Monday’s collapse, which brought chainsaw-wielding members of the Jasper Volunteer Fire Department to the scene to cut away the fallen wood and metal.

All of the animals were injured to varying degrees. On Thursday, Ramirez found that the pregnant gray mare–one of the last horses pulled from the rubble–had died.

“I had had her for about four years; I got her from some people who weren’t really taking that good of care of her,” Ramirez said. “She was always on the thin side