A few posts on here have got me thinking particularly one from @som farmer has any tested suckler cow milk for protein and fats because the more good stuff it has it in the faster than calf we grow I know that growth weights will show some of the better cows because of those weights but they might be better converters of feed i also know that most suckler cows are a bit more good with there legs then dairy cows but sure it could be done. Just thinking it will be a starting point to breed a better milkier cow