3waycross":29v4y4xf said:Don't forget a lot depends on your heifers. I have had heifers drop a 90lb or better calf unassisted. I have also seen heifers darned near die trying to spit out a 70 lb calf.
Don't forget a lot of calving ease is structure not just weight. A 90lb rope passes a lot easier than a 70lb Concrete block.