One of the greatest evolutionary success stories there is. They've offshored the thinking and labor. They have this monkey species willing to clearcut forests to set up entire cow city apartment complexes, with running water, power, hvac. These monkeys train for years just to be able to medically treat the cows. They are not only under no threat of predation, diseases are being studied and combated by teams of monkeys in research institutions across the planet. They've even managed to get a cleaner death than the monkey: they go instantly via pneumatic airgun in relatively good health while the monkey will probably waste away in poor health over some days of agony and/or morphine. Monkeys monitor stress levels of the cow to make sure they don't get too high and foul the meat, while the monkey works their fellow monkeys into all sorts of stress based health conditions. The cow lineage is also continually being improved via all tools of genetic engineering the monkey has painstakingly developed, but will refuse to ever use on their own species due to ick factor.

cow genes achieved terrific success

cow organisms and social layer on top - probably not (unless we decide to uplift them one day)