Automated Headcount + Cast/Down-Animal Detection

Each animal stirs the signal, so the pen count comes straight from how much the space ripples. An animal stuck on its back or collapsed goes almost completely still — the same signature as a human fall, which is already proven. Overnight, stillness in the wrong place raises the alarm within hours, not at morning rounds.

In the physics: Each animal is a moving scatterer occupying volume; occupancy count from CSI is already proven to r=0.9, and a down/motionless animal collapses its micro-Doppler to near-zero while flattening its RTI silhouette — the same physical signature as the proven human fall detector (AUC 0.8).