UroFlow analysis is now possible in mice and rats. Urine is allowed to fall freely from the cage floor onto a collection plate that rests on a specially designed load cell. The load cell is very precise (+/- 0.005g accuracy, 0.001g resolution); the load cell is not vulnerable to off-axis loading so measurements made at the edge of the cage are the same as in the center. Measurements are streamed at 10Hz to a dedicated data file for true urine-flow analysis.