You can just see how small she is with some perspective.
She didn't drink tonight. She hasn't gone to the bathroom yet, so she's not hungry.
Every once in awhile a calf is born with a deformity of its intestinal tract. If it can't go to the bathroom, it won't make it.
Hopefully, tomorrow she'll be better.
Newborns! You have to watch everything about them. What they eat, when they go, how they act. They're delicate little creatures.
Thankfully, they get hardier as they grow up. These look like forces to be reckoned with.