To me a cow maker is a bull that will consistently produce fertility, soundness, and longevity in your environment. There are a lot of bulls out there that have been used that will produce WW, YW and $B, with impressive EPD's across the board....there are much fewer that will consistently produce daughters that will stand the test of time. I've heard it said before that often your most profitable cow is one you don't notice until she is a teenager. She never raised your biggest calf, but she raised a good calf every year, on time, and you never had to intercede, treat, or help her in any way. We are hardwired as breeders to breed for the best, most pleasing phenotype, curve bender of a calf, but what really pays the mortgage are fertile, trouble free cattle with longevity. More breeders breed for the former than the latter. Some people call them multipliers and not breeders. Choose a sire from a program that treats their cows at least as hard as you do, as close to your environment as possible, and you're more likely to find a cow maker bull. Burke Teichert has said that most people will make more money using a terminal sire and buying replacement females from someone who is breeding for the aforementioned attributes, unless you have the scale to run a separate replacement herd, with a true maternal bull. Its a belief i adhere to.