The present invention relates to a farming/veterinary device, system, and method for sensing force to analyze the stance of an animal or human to determine lameness and total weight monitoring. The invention is directed to an air cushion device for determining lameness and total weight management for animals with an air cushion for each animal leg which will enable the system to determine the force exerted on each air cushion. Optimally, the air cushion device is waterproof. The system is directed to incorporating the air cushion device with an air supply system and sensor system to automatically determine lameness and total weight in animals. The method is directed to a procedure for using the air cushion system to determine lameness and total weight in animals. Because implementations of the device are waterproof, it is suitable for use in any type of wet or dirty environment. Further, due to making the determinations while the animal is standing still, the device is capable of on-site installation in areas of the farm such as milking stalls, cattle chutes, and other small areas in which the animal is used to being.