CattleScale: Weighing Cattle from the Fence Line

Field notes

The workflow uses a whole-animal side-on photograph plus a reference object whose real size is known, such as a gate, fence post, person, or 20 litre bucket. The stated calculation infers shoulder height, body length, and heart girth from pixels before applying Schaeffer’s formula, and the assessment is read three times with the middle result retained. The page says basic observations are free, while weight, measurements, and market value cost A$1 per animal after the first reading.