First off I agree with Robert, if I have a cow I have to worry about running me over it grows wheels, goodbye, too many good mannered cattle to own. Second I have a small operation, so I use a iron pipe about 10 to 12 ft long. I drilled a hole about a ft or two from one end and bolted In a eye loop. Within 24 hrs of birth I tie the calves legs like a calf roper with no roping experience. Give the shots, ear tag and weigh. I stab the end of the 10 to 12 ft rode in the ground, hang a scale from the eye loop and hook the other end to the calf's leg ties. Then just use the leverage to lift the pole and calf off the ground to get the weight. Easy and only minimal hard breathing.