Ok so I am new to cattle ranching so I need some advice on selection and culling of cattle. I plan on having a high cull rate in the beginning so that only my best cattle reproduce and will be the foundation from which I build the longevity of my herd. I am not a huge operation and starting small so forking out huge amounts of money on extras is not an option. I am needing to know what method a small rancher can use to select cattle for marbling? I am using AI for my sires with known high marbling so I have that covered....but if I want to have my heifer or her offspring tested so I can see if I should keep them or cull them...how do I go about that? Genomic testing or ultrasound or both? Or something else? Pricing estimates would be of help to. Thanks for helping a lady out! Much appreciated!