What kind of birth weights have you all seen out DR. WHO? Would like you use him on an Angus X Irish Whiskey(son) heifer that will calve as a two year old. Her mother has always had peanuts--figure it has passed to her but I just want a calf out of her the first time. Dr. Who will help out most if not all of her shortcomings but not sure of his calving ease. Thanks for any response.