Camera scores are screening — not diagnoses

A camera that watches cows walk can flag who to pull and whether the pen's gait is drifting. That is decision support. It is not a lesion name, a treatment order, or a replacement for a trim chute and a veterinarian.

Computer-vision locomotion or gait scores aim to catch asymmetry, shortened strides, and arched backs at a throughput human locomotion scoring rarely matches. Used well, they shrink the list for barn-first checks and help managers see week-to-week herd trends — the same spirit as rumination alarms and hoof-record codes: pattern first, cow second.

Accuracy moves with camera angle, lighting, occlusion, flooring, breed, speed of walk, and how the model was validated. A score that looks decisive on a clean alley can wobble in a crowded, muddy return lane. Treat odd or sudden scores as prompts to look — not as proof of a named disease.

Pair camera alerts with standing time as the dose, stall and flooring comfort, and coded hoof-trim records. A rising "lame" list with long lock-ups and soft soles is a time-budget and facility story. Ambiguous or deteriorating cows still need direct examination and veterinary assessment.

Walk the camera's view: Is the alley lit and unobstructed? Do cows actually pass single-file where the model expects? How many high scores cleared after a quiet pen walk with no treatment? If the list grows while cows look fine, check placement and validation before rewriting the SOP.

Sister notes on this universe cover the parlor that added two hours of standing, naming horn or skin before you spray, standing time as the dose, and hoof records as herd trends; the inside-the-rumen universe's the-sensor-is-a-barn-alarm-not-a-diagnosis note picks up the same barn-alarm pattern for wearables. Educational only — not a diagnosis, prescription, or treatment protocol.